Third stage kidney disease, commonly referred to medically as stage 3 chronic kidney disease (CKD), means that kidney function is moderately reduced.
Stage 3 CKD is generally divided into two categories:
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Stage 3a: eGFR 45–59 mL/min/1.73 m²
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Stage 3b: eGFR 30–44 mL/min/1.73 m²
However, an eGFR in this range does not by itself establish chronic kidney disease. The abnormality needs to persist for at least three months or there must be other evidence of kidney damage, depending on the clinical situation.
At this stage, the kidneys may still perform many important functions, but reduced filtration requires appropriate monitoring and treatment.
At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides individualized evaluation and long-term care for patients with chronic kidney disease.
Is Third Stage Kidney Disease the Same as Kidney Failure?
No.
Stage 3 CKD is not the same as kidney failure.
Kidney failure generally refers to kidney function being severely reduced, typically in the kidney failure range of eGFR below 15, although treatment decisions depend on the complete clinical situation.
A person with stage 3 CKD usually does not automatically need dialysis.
The focus at stage 3 is often on identifying the cause, controlling risk factors, managing complications and protecting remaining kidney function.
What Causes Third Stage Kidney Disease?
Several conditions can contribute to stage 3 CKD.
Common causes include:
Diabetes
Long-term high blood glucose can damage the small blood vessels and filtering structures of the kidneys.
Persistent albumin in the urine can be an early sign of diabetic kidney damage.
High Blood Pressure
Uncontrolled hypertension can damage kidney blood vessels over time.
Kidney disease can also contribute to high blood pressure, creating a cycle in which both conditions affect each other.
Glomerular Diseases
Conditions affecting the kidney's filtering units can cause proteinuria, blood in the urine and declining kidney function.
Examples include:
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IgA nephropathy
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FSGS
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Membranous kidney disease
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Other forms of glomerulonephritis
Polycystic Kidney Disease
Inherited disorders such as autosomal dominant polycystic kidney disease can gradually reduce kidney function in some patients.
Recurrent Kidney Problems
Repeated obstruction, severe infections, kidney stones or episodes of acute kidney injury can contribute to long-term kidney damage in certain patients.
Other Causes
Additional causes can include autoimmune diseases, congenital kidney abnormalities, vascular disease and certain medication-related or toxic kidney injuries.
Determining the cause is important because treatment differs according to the underlying disease.
What Are the Symptoms of Third Stage Kidney Disease?
Some people with stage 3 CKD have few or no noticeable symptoms.
When symptoms occur, they may include:
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Fatigue
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Swelling around the feet or ankles
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Changes in urination
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Foamy urine
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Increased or decreased urine frequency
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Muscle cramps
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Dry or itchy skin
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Reduced appetite
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Nausea
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Sleep problems
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Difficulty concentrating
These symptoms are not specific to CKD, so testing is necessary to determine whether kidney disease is responsible.
Can Stage 3 Kidney Disease Be Found Without Symptoms?
Yes.
Kidney disease can develop silently.
A person may discover reduced kidney function during routine testing for diabetes, hypertension or another health condition.
Important tests can include:
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Serum creatinine
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eGFR
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Urine albumin-to-creatinine ratio
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Urinalysis
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Blood pressure measurement
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Electrolyte testing
This is one reason people at increased risk of kidney disease may benefit from regular kidney-function monitoring.
Understanding eGFR in Third Stage Kidney Disease
eGFR estimates how effectively the kidneys filter blood.
The stage 3 range is divided into:
| CKD Category | eGFR |
|---|---|
| G1 | 90 or higher |
| G2 | 60–89 |
| G3a | 45–59 |
| G3b | 30–44 |
| G4 | 15–29 |
| G5 | Less than 15 |
These values help classify kidney function, but eGFR should not be interpreted in isolation.
Doctors may also look at:
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Albuminuria
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Rate of eGFR decline
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Blood pressure
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Diabetes
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Electrolytes
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Medication use
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Imaging
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Underlying kidney disease
Why Urine Protein Matters in Stage 3 CKD
Kidney function is only one part of assessing CKD.
The amount of albumin or protein in the urine can provide important information about kidney damage and future risk.
A urine albumin-to-creatinine ratio, or UACR, may therefore be included in routine assessment.
Higher albuminuria can influence treatment decisions and monitoring.
A patient should not assume that a stable creatinine means the kidneys are completely healthy if significant protein or albumin is present in the urine.
How Is Third Stage Kidney Disease Treated?
There is no single medicine that treats every case of stage 3 CKD.
Treatment is based on:
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The cause of kidney disease
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eGFR
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Albuminuria
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Blood pressure
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Diabetes status
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Electrolytes
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Cardiovascular risk
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Other medical conditions
The objective is generally to preserve kidney function and reduce complications.
Blood Pressure Management
Controlling blood pressure is an important part of CKD care.
Depending on the cause and presence of albuminuria, doctors may prescribe medicines such as:
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ACE inhibitors
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ARBs
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Other blood-pressure medicines
ACE inhibitors and ARBs may be particularly useful in selected patients with albuminuria.
However, these medicines require appropriate monitoring of kidney function and potassium.
Never start or stop blood-pressure medication without medical guidance.
Diabetes Management
If diabetes is contributing to CKD, appropriate glucose management is important.
Depending on the individual patient, treatment may include:
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Lifestyle changes
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Diabetes medicines
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Regular glucose monitoring
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Kidney-function monitoring
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Urine albumin assessment
Certain kidney-protective diabetes treatments, including SGLT2 inhibitors, may be appropriate for selected patients depending on eGFR, albuminuria, diabetes status and other factors.
Can Stage 3 CKD Be Reversed?
Whether kidney function can improve depends on the cause.
If an apparent decline is partly due to a reversible problem, such as dehydration, medication-related kidney injury or acute illness, kidney function may improve after the underlying problem is corrected.
Established chronic kidney scarring generally cannot simply be reversed.
Therefore, treatment usually aims to:
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Identify reversible factors
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Control the underlying disease
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Reduce additional kidney injury
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Manage complications
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Slow further decline
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Preserve remaining kidney function
Stage 3 Kidney Disease Diet
There is no single diet that is appropriate for every person with stage 3 CKD.
Dietary recommendations depend on:
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Potassium level
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Phosphorus level
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Protein intake
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Sodium intake
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Diabetes
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Blood pressure
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Weight
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Nutritional status
Reduce Excess Sodium
Reducing excessive salt intake can support blood-pressure and fluid management.
Protein Intake Should Be Individualized
Too much protein may increase dietary nitrogenous waste, while unnecessary severe protein restriction can cause inadequate nutrition.
A renal dietitian can help determine an appropriate intake.
Potassium
Not every person with stage 3 CKD needs to restrict potassium.
Restriction should generally be based on blood potassium, medications and individual circumstances.
Phosphorus
Phosphorus management may become important when blood levels are elevated or mineral-bone abnormalities develop.
Do not eliminate foods unnecessarily without professional advice.
Can Drinking More Water Improve Stage 3 Kidney Disease?
Not necessarily.
Adequate hydration is important, but more water does not repair chronic kidney damage.
Fluid requirements vary depending on:
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Kidney function
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Heart health
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Urine output
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Weather
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Medications
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Swelling or fluid retention
People with fluid retention or certain heart and kidney conditions may actually need a fluid limit.
Follow the fluid recommendations provided by your healthcare professional.
Medicines to Be Careful With in Stage 3 CKD
Kidney function can affect how medicines are processed and eliminated.
Some medicines may require dose adjustment.
Patients should tell their doctor about:
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Prescription medicines
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Over-the-counter painkillers
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Supplements
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Herbal products
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Contrast exposure
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Other treatments
Certain NSAID painkillers can cause kidney problems in susceptible patients, particularly with dehydration or pre-existing CKD.
Do not routinely use painkillers or supplements without checking whether they are appropriate for your kidney function.
Can Stage 3 CKD Progress to Kidney Failure?
It can, but progression is not inevitable for every patient.
The future course depends on factors such as:
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Underlying cause
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eGFR level
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Rate of kidney-function decline
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Albuminuria
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Blood-pressure control
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Diabetes control
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Cardiovascular disease
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Smoking
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Medication adherence
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Episodes of acute kidney injury
Regular monitoring can help identify meaningful changes in kidney function.
How Can You Protect Kidney Function in Stage 3?
Practical kidney-protection measures may include:
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Monitor blood pressure regularly.
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Manage diabetes when present.
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Follow prescribed medicines correctly.
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Avoid unnecessary NSAID use.
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Avoid unverified kidney supplements.
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Reduce excessive dietary salt.
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Maintain a healthy weight.
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Stay physically active according to your health status.
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Avoid smoking.
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Attend scheduled blood and urine tests.
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Treat urinary infections and other kidney problems appropriately.
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Follow an individualized kidney-friendly diet.
What Tests Are Commonly Monitored?
Your nephrologist may recommend different tests depending on the cause and severity of CKD.
These can include:
Blood Tests
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Creatinine
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eGFR
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Potassium
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Sodium
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Bicarbonate
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Hemoglobin
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Calcium
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Phosphorus
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Blood glucose
Urine Tests
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Urinalysis
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UACR
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Urine protein assessment
Other Investigations
Ultrasound or other imaging may be recommended when structural abnormalities, obstruction, cysts or stones are suspected.
Anemia and Stage 3 Kidney Disease
Kidneys contribute to the production of erythropoietin, a hormone involved in red blood cell production.
As CKD progresses, some patients develop anemia.
Possible symptoms include:
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Tiredness
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Weakness
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Reduced exercise tolerance
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Shortness of breath
If anemia is suspected, doctors may assess hemoglobin and, when appropriate, iron status and other causes.
Treatment depends on the severity and underlying cause.
Bone and Mineral Changes
CKD can affect the body's regulation of calcium, phosphorus, vitamin D and parathyroid hormone.
Some patients with more advanced CKD may develop mineral and bone abnormalities.
Monitoring may therefore include:
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Calcium
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Phosphorus
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Parathyroid hormone
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Vitamin D in selected situations
Treatment should be based on laboratory results and the individual's overall clinical condition.
When Should You See a Nephrologist?
Specialist kidney evaluation may be appropriate if you have:
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Persistent eGFR reduction
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Significant proteinuria or albuminuria
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Progressive decline in kidney function
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Unexplained blood in urine
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Difficult-to-control blood pressure
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Recurrent kidney stones
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Electrolyte abnormalities
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A complex kidney disease
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Repeated episodes of acute kidney injury
Early nephrology care can help identify the cause and establish a monitoring and treatment plan.
When Is Stage 3 Kidney Disease an Urgent Problem?
Stage 3 CKD itself is not usually an emergency.
However, urgent medical evaluation may be required if someone with kidney disease develops:
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Very little or no urine
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Severe breathlessness
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Chest pain
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Severe swelling
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Confusion
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Persistent vomiting
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Severe weakness
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Sudden deterioration
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Symptoms associated with dangerously high potassium
These symptoms may indicate an acute complication rather than simply stable stage 3 CKD.
Stage 3 Kidney Disease and Kidney Transplant
A person with stage 3 CKD does not normally need a kidney transplant simply because they have reached stage 3.
Transplant evaluation is generally relevant when kidney disease progresses toward kidney failure and transplantation becomes an appropriate kidney-replacement option.
Early education can nevertheless be useful for patients whose kidney function is progressively declining.
Third Stage Kidney Disease Care at Prabhakar Bhurke Clinic
At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides individualized care for patients with chronic kidney disease.
Depending on the patient's condition, evaluation and follow-up may include:
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Reviewing creatinine and eGFR trends
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Assessing urine albumin and protein
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Identifying the cause of CKD
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Monitoring blood pressure
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Managing diabetes-related kidney disease
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Reviewing medications for kidney safety
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Monitoring electrolytes
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Evaluating anemia and mineral abnormalities
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Managing kidney stones or urinary obstruction when relevant
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Planning long-term kidney care
The treatment approach is tailored to the patient's kidney function, underlying disease and other health conditions.
Frequently Asked Questions
What does third stage kidney disease mean?
Third stage kidney disease generally refers to stage 3 chronic kidney disease, which is divided into stage 3a with eGFR 45–59 and stage 3b with eGFR 30–44. Chronicity and other evidence of kidney damage must be considered when diagnosing CKD.
Is third stage kidney disease serious?
Stage 3 CKD represents a meaningful reduction in kidney function and requires appropriate medical follow-up. However, it is not the same as kidney failure, and dialysis is not automatically required.
Can stage 3 kidney disease go back to normal?
A reversible component of kidney dysfunction may improve when the underlying cause is treated. Established chronic kidney scarring generally cannot simply be reversed.
What should I eat with stage 3 kidney disease?
Diet should be individualized. Sodium, protein, potassium and phosphorus intake may need adjustment depending on laboratory results and other health conditions. A renal dietitian can provide personalized guidance.
Can stage 3 kidney disease patients drink a lot of water?
Not necessarily. Fluid requirements vary. Excessive water intake can be harmful in people with fluid retention or certain heart and kidney conditions.
Does stage 3 kidney disease require dialysis?
No. Stage 3 CKD does not automatically require dialysis. Dialysis is generally considered much later when kidney failure and its complications cannot be adequately managed without kidney replacement therapy.
Can diabetes cause third stage kidney disease?
Yes. Long-term diabetes can damage kidney filtration structures and contribute to CKD. Appropriate blood-glucose, blood-pressure and kidney-protective management can help reduce the risk of progression.
Conclusion
Third stage kidney disease, or stage 3 CKD, indicates moderately reduced kidney function and is divided into stage 3a and stage 3b according to eGFR.
It does not automatically mean kidney failure or the need for dialysis.
The most important steps are to identify the underlying cause, monitor eGFR and urine albumin, control blood pressure and diabetes when applicable, review medicines, manage complications and make appropriate lifestyle and dietary changes.
Because progression varies from person to person, regular follow-up is important even when symptoms are mild or absent.
For individualized assessment and long-term kidney care, patients with third stage kidney disease can consult Dr. Sandip Prabhakar Bhurke at Prabhakar Bhurke Clinic.
Medical Disclaimer
This article is intended for general educational and informational purposes only and should not be considered a substitute for professional medical advice, diagnosis or treatment. Third stage kidney disease can have different causes, and treatment depends on kidney function, urine findings, underlying disease, medications, laboratory results and overall health. Do not start, stop or change prescription medicines, painkillers, supplements, diet or fluid intake based solely on this article. An eGFR value alone does not establish chronic kidney disease unless the required duration or other evidence of kidney damage is present. Seek urgent medical attention for very little or no urine, severe breathlessness, chest pain, confusion, persistent vomiting, severe swelling or sudden worsening of health. Consult Dr. Sandip Prabhakar Bhurke or another qualified nephrologist for personalized kidney care.
