Rapper Vic Mensa Pleads Guilty To Being In Possession Of A Controlled Substance

Vic Mensa's pleading guilty to possession of a controlled substance, but he won't do any time behind bars after striking a deal with prosecutors ... TMZ has learned.

Kendra Glover, a rep for the Loudoun County Commonwealth's Attorney, tells TMZ ... Mensa pled guilty to one count of possession of a Schedule III controlled substance, which is a Class 1 misdemeanor.

We're told as part of the plea deal he got 12 months in jail, but that was suspended -- meaning instead of serving it behind bars, he'll have a year of unsupervised probation.

Vic will also have to take a substance abuse assessment, perform 25 hours of community service, and pay a $1k fine. BTW, he'll get 50 percent off that fine if he successfully completes the other probation terms.

As we've reported, Vic was arrested back in January at Dulles International airport for going through customs with a stash of shrooms.