Passport visa page damaged \ detached from the passport

[tej246]

Hi,

I am on a visitor visa in US and will be going back to India on 4th June 2016. Unfortunately, by mistake my passport has got damaged where the US visa stamp page has been detached from the passport.I have below questions for accessing my options to travel back.

1. Will I be allowed to travel back to India from US on 4th June 2016 on the current passport or do I need to apply for a new passport?
2. Can a visitor visa holder apply for a new passport?
3. In case I am allowed to go back, what will be the scenario at Indian immigration?

Please let me know if anyone has pointers in this regard.

Thanks,
Tej