@lindes With Stage 3b, my take is to also be watching food with high potassium, phosphorous, and calcium, along with the sodium and protein levels. Kidney disease can slide real quickly to lower levels of health, and higher stages of CKD. That's the biggest issue with kidney disease, in my own case and as many of us will attest to, also. Kidney disease often sneaks up on a person, and we learn to live well with decreasing kidney function, until [it seems[ all of the sudden, we can't.

Diabetes and high blood pressure appear to be the main contributing factors for chronic kidney disease. Other factors that people experience can be medication interactions [long term or not], lifestyle choices, or genetic factors [such as polycystic kidney disease]

@evdos Here are the links from @kamama94 She will tell us that some food labels have changed, so it does bear value to read carefully, and become your own best advocate.
https://cdn.prod-carehubs.net/n1/748e8fe697af5de8/uploads/2021/05/DIABETIC-AND-RENAL-FRIENDLY-VEGETARIAN-1.pdf
https://cdn.prod-carehubs.net/n1/748e8fe697af5de8/uploads/2021/05/DIABETIC-AND-RENAL-FRIENDLY-VEGAN-AND-NATIVE-AMERICAN-RECIPES-2.pdf
As for trusted websites to research for diet plans, check out
-National kidney nutrition guidelines based on your current stage https://www.kidney.org/nutrition
-American Kidney Foundation guidelines for diet and recipes - https://kitchen.kidneyfund.org/?source=google&medium=cpc&campaign=kidneykitchen&gclid=Cj0KCQjw166aBhDEARIsAMEyZh5XN0g5gDSF5SJigl9Q8juUvv3c0BXgXIsLHpjVdYXf6mDBild-MdIaAoT9EALw_wcB
-DaVita diet and nutrition [one of the two major players in dialysis] https://www.davita.com/diet-nutrition

Lots of reading material here! We're here to listen to questions/concerns/experiences you have! Remember, everyone is different. What may work for you, may not be suitable for others. And that's what makes Mayo Clinic Connect so valuable for everyone. In my case, not only do I follow a renal diet, I also need to consider my gout issue, so I have restrictions there. I really miss mushrooms! And, I was recently cleared to eat more potassium foods due to low levels in my system - yeah! for orange juice again!
Ginger

As you have read here, there are many more food restrictions to consider for type 2 diabetics and stage 3B. I also have a Mayo nephrologist in AZ, and I have touched Stage 4, and finally returned to Stage 3A because of medications of Torsemide on one occasion, and Farxiga on another. I watched the trends of my labs, put them into a spreadsheet with comparison of one drug and its effects on my trend. I did the same with the second drug when that was in use. Nephrologists, for some reason, think that these 2 drugs would help type 2 diabetics. For me that wasn't the case. When following dietary restrictions, please also look at your medications as a possible further cause of Stage 3B and perhaps touching Stage 4.