Regret Laser Hair Removal After 3 Sessions?

Not to worry, without completing your full sessions the hair will eventually grow back but might be thinner then before

To see full correction from laser hair removal you would need a series of 6-8 treatments total. It may take some time but eventually thin/patchy hair  will reappear

Any follicles that have been destroyed with laser hair removal are not capable of regrowing hair under any circumstances. So, those hairs will not be able to grow hair ever again. You will still have any hairs that weren't affected or in the right stage for the laser to target them. Additionally, the body does get new follicles over time, so you can get sparse growth in areas from that as well. At only 3 sessions you should have had good, but moderate results only, so you should still have plenty of hair in those areas.

"This answer has been solicited without seeing this patient and cannot be held as true medical advice, but only opinion. Seek in-person treatment with a trained medical professional for appropriate care."