Dear aspirant,

Actually IISERs do not declare cutoffs , neither do they declare individual marks. They just declare if the candidate is selected or Not.

I am providing you the link where you can have a look at the previous year's merit list and get an idea about your chances for admission in IISER. There you will also find other information related to IISER which may be helpful.

https://engineering.careers360.com/articles/iiser-merit-list-and-cutoff

I hope this helps!