Can I remove an ATI Mobility Radeon HD 3650 and upgrade it in a laptop?

Probably not. The technical specifications on ATI's website do not indicate that GPU is a FlexFit model. But, check with your laptop manufacturer.

Nope.
There are very few laptops you can upgrade video cards in and they are at the TOP end of the market.

Okay thanks guys. It will be good enough for a long time yet.