Final answer:
To follow a low-potassium diet for stage 3 CKD, the patient should avoid high potassium foods like oranges, bananas, avocados, and spinach. Instead, they should choose foods like apples, berries, dairy products, fish, and whole grains.
Step-by-step explanation:
To follow a low-potassium diet, a patient with stage 3 CKD should avoid foods high in potassium, such as oranges, bananas, avocados, and spinach. Instead, the patient should choose foods like apples, berries, dairy products, fish, and whole grains.