Hello,

Your chances of getting IISER is very less. The minimum you should be scoring to have secured admission in IISERs is around 75-85 for OBC. You will definitely be not getting a seat in any IISERs in regular round even for your 3rd choice IISER. The competition for IISER is very high and thus it's cutoff generally climbs up which futher reduces your chances. I would still suggest you to go for it and see if you get lucky.

Thank You