Sounds like the paleo diet. Personally, I would say around 50 grams. However, at three months out, I would say that wouldn't be too difficult for you to do as most of your stomach space should be taken up by all the protein you need to eat. How much protein are you getting in every day?
The number one rule when I had surgery was "no sugar and no fruit". Also "fat is your friend". So, if you are getting in all your protein and are avoiding simple sugar and fruit like the plague... then you should do fine. Just eat your protein first and then fill in with veggies. If you want to reduce your carb intake even more, then limit your intake of grains, potatoes, carrots, peas and corn also.