How long after a mini tummy tuck do I have to wear the compression garment, can I take it off for short periods of time?

I recommend 3 months of compression garments after mini tummy tuck or tummy tuck. Generally speaking, the garment can be off a few hours per day. 

Compression garments are helpful in controlling swelling and supporting tissues as they heal. It is best to consult with your surgeon for how long they should be worn, as opinions vary. They are most helpful in the early stages of recovery and should be worn continuously except when showering.

I would suggest asking your surgeon what he/she prefers since every surgeon has his/her own protocol about garments. For my patients, they leave the garment off at night after the first two weeks.