Hi aspirant,

No no you don't have to pay the application fee for SRM phase 3 in case you did not get any slots due to system failure or unavailability of a slot. You will get an email regarding the same allowing you to choose your preferred slot during the phase 3.

However in case you missed it due to to your negligence, then you have to pay an amount of 1100 to apply for phase 3.

Hope it helps!!