I wrote jee on 8-1-2020 and it is on 2nd session and I got 35 percentile am I selected for jee advance and I come under general 3B

You haven't mentioned the State you belong to. This is important to know because the cut offs are different for Home State Candidates and Other State Candidates. So do please let us know your Home State. Meanwhile,your rank can be predicted by using the formula, (100-your total percentile)*869010/100. In your case, your approximate rank would be 564856 . Let's say the number of candidates for April exam increased to 12,00,000 then your final rank shall be (100 - your total score) X 12,00,000/100.

With this rank, it might be difficult for NIT. But if you want to appear for JEE Advanced, you should appear for April Session.

Now to predict colleges, please use our college predictor:https://engineering.careers360.com/jee-main-college-predictor