Nate Diaz is off the hook in his nightclub battery case ... according to his attorney, the misdemeanor charge the fighter had been facing was dismissed this week.

The MMA star's lawyer, Ross Goodman, tells TMZ Sports ... after Diaz completed an impulse control class online, prosecutors dropped the battery count against him ahead of Thursday's scheduled trial.

The case, of course, stemmed from a run-in Diaz had with a Las Vegas nightclub employee back in August 2024.

Diaz was accused of striking the man in the face -- as he and his acquaintances were trying to get into the Omnia at Caesars Palace.

Goodman acknowledged the confrontation did happen -- but he was adamant his client was merely defending himself.

We've reached out to prosecutors for comment, but so far, we've yet to hear back.

As for Diaz -- who last fought in the UFC in 2022 -- he's not yet publicly spoken about the matter.