I got 3k rank I get seat in sastra in 3rd counselling for any group
It would be difficult for you to get a seat in Sastra University as it is a pretty famous university with fierce competition. Then again, it depends on your branch too. If you want to choose a branch with less competition, then you can get admission if you wait till 3rd counselling. If you are of SC/ST category, then you have better chances of getting a seat.
Regards.