Brother, let me introduce with some pintch of reality.

Forget about qalifying, isuppose if GEN candidate is getting a 15k rank still, he have no chance to get a seat at IIT.

So, definitely if an aspirant has not cleared the JEE advanced then getting a seat at is out of his/her bond.

Though he can participate in JoSAA, as per his JEE mains scorecard. In that he cannot fill the IIT ollege as choices.

Thank You