"The case is dismissed, and we are very pleased with the outcome," his lawyer, Eric Franz, said Monday outside Manhattan Criminal Court (search).
In July, the actor had rejected a plea bargain that would have required him to perform three days of community service in exchange for pleading guilty to second-degree harassment.
Slater, 36, was arrested May 31 and charged with forcible touching for allegedly groping a woman during a late night run-in on the Upper East Side. He faced up to a year in jail if convicted.
Slater, whose credits include "Heathers," "Broken Arrow" and "True Romance," was appearing in Alate"The Glass Menagerie" on Broadway at the time of his arrest.
It was not his first run-in with the law. The actor was sentenced to 90 days in jail for an August 1997 incident where he reportedly bit one man in the stomach and threw a police officer against a wall during a rowdy Los Angeles party.