Dustin Diamond -- Screech Sentenced to Jail for Bar Stabbing

Dustin Diamond did not get saved by a Wisconsin judge ... who sentenced the actor to 120 days in jail for a bar stabbing incident.

During Thursday morning's hearing, Diamond also got 15 months probation, and cannot return to the scene of the crime or contact the victim. However, he was ordered to pay the victim $1,105 in restitution.

The "Saved by the Bell" star will serve his 120 days in two 60 day stints.

Diamond was arrested in December 2014 for stabbing a man during a bar altercation on Christmas night. He was convicted of carrying a concealed weapon and disorderly conduct ... both misdemeanors.

During sentencing, the judge admonished Dustin for even carrying a knife -- since Wisconsin's such a safe place.

They're gonna LOVE Screech in the yard.