Hello

You can leave your physiotherapy seat if you want to(since you have already finished three years of the course) but you will have to get th eTransfer certificate from your college administration. Without it you will not be given a seat in the counselling. There may be a requirement of paying bond money before you can retrieve your original certificates from them.

In any case, I will suggest you to enquire for ypour tc from your college administrative office. All the best!