‘Love Island’ contestant Cashel Barnett copped a plea deal in his home violence case … and it seems to be like he will spend the subsequent yr behind bars.

In line with new authorized docs, obtained by TMZ, Cashel agreed to plead responsible to at least one rely of third-degree felony aggravated assault and one rely of third-degree felony home violence within the presence of a kid.

Cashel is scheduled to be sentenced March 16 in a Utah courtroom … and the docs present prosecutors will push for him to get a yr in jail after which probation.

We broke the story … prosecutors in Utah hit Cashel with a slew of prices final yr after he allegedly assaulted his ex-girlfriend in entrance of their 1-year-old daughter.

Cashel has been locked up since a minimum of Could.

A supply near the alleged sufferer tells TMZ … she advised prosecutors she did not really feel this plea deal was honest, but when that was the most effective provide, she’d OK it to keep away from a trial and retraumatization.