Brendon pleaded guilty to criminal mischief, a misdemeanor, in the incident that happened Sept. 30. The actor allegedly grabbed his girlfriend by the throat, took her car keys and threw her cell phone during a fight at a Saratoga Springs, N.Y., hotel.
The Saratoga Springs District Attorney told the Union Times that, as part of the "conditional charge" issued by the judge, 44-year-old Brendon will not serve jail time if he completes drug and alcohol counseling and stays out of trouble for a year.
Brendon was intoxicated during the incident, police said, and was charged with felony third-degree robbery, two counts of criminal mischief and one count of obstruction of breathing.
See photos of Nicholas Brendon through the years:
Buffy the vampire actor Nicholas Brendon
'Buffy the Vampire Slayer' actor pleads guilty after allegedly choking girlfriend
LONG BEACH, CA - SEPTEMBER 13: Actor Nicholas Brendon at the Long Beach Comic-Con 2015 held at Long Beach Convention Center on September 13, 2015 in Long Beach, California. (Photo by Albert L. Ortega/Getty Images)
WEST HOLLYWOOD, CA - FEBRUARY 09: Nicholas Brendon attends the 'Ms. In The Biz' book launch party co-hosted by FilmBreak and presented by Dog & Pony on February 9, 2015 in West Hollywood, California. (Photo by Araya Diaz/Getty Images for Ms. In The Biz)
LOS ANGELES, CA - JANUARY 24: Actor Nicholas Brendon at The Hollywood Show held at The Westin Hotel LAX on January 24, 2015 in Los Angeles, California. (Photo by Albert L. Ortega/Getty Images)
LOS ANGELES, CA - JULY 14: Actor Nicholas Brendon attends the 31st annual Outfest Los Angeles LGBT film festival - 'Big Gay Love' special screening at Directors Guild Of America on July 14, 2013 in Los Angeles, California. (Photo by Vincent Sandoval/WireImage)
CHICAGO, IL - APRIL 15: Actor Nicholas Brendon poses for a portrait session at the 2012 Chicago Comic and Entertainment Expo at McCormick Place on April 15, 2012 in Chicago, Illinois. (Photo by Timothy Hiatt/Getty Images)
CHICAGO, IL - APRIL 15: Actor Nicholas Brendon attends the 2012 Chicago Comic and Entertainment Expo at McCormick Place on April 15, 2012 in Chicago, Illinois. (Photo by Barry Brecheisen/WireImage)
Nicholas Brendon of 'Kitchen Confidential' at the Santa Monica Pier in Santa Monica, California (Photo by John Sciulli/WireImage)
Nicholas Brendon during Creation Entertainment's Grand Slam XI: Sci-Fi Summit - Day Three at Pasadena Civic Auditorium in Pasadena, California, United States. (Photo by Albert L. Ortega/WireImage)
Nicholas Brendon of 'Buffy' and his wife at the UPN 2003 Winter TCA Tour held at the Renaissance Hotel in Los Angeles, CA on January 12, 2003. Photo by Barbara Binstein/Getty Images.
Nicholas Brendon & wife Tressa during 1st Annual Celebrity Dodgeball Game to Benefit The Elizabeth Glaser Pediatric Aids Foundation at Toluca Lake Tennis Club in Los Angeles, California, United States. (Photo by Jean-Paul Aussenard/WireImage for InStyle Magazine)
Alyson Hannigan & Nicholas Brendon during 1st Annual Celebrity Dodgeball Game to Benefit The Elizabeth Glaser Pediatric Aids Foundation at Toluca Lake Tennis Club in Los Angeles, California, United States. (Photo by Jean-Paul Aussenard/WireImage for InStyle Magazine)
James Marsters, Dean Valentine, Nicholas Brendon, Michelle Trachtenberg and Amber Benson at a screening of 'Once More With Feeling', the musical episode of 'Buffy, The Vampire Slayer' at the Paramount Theater in Los Angeles, Ca. Friday, November 2, 2001. Photo by Kevin Winter/Getty Images.
Nicholas Brendon during ''Buffy' The Musical: Once More, With Feeling' Premiere Screening at Paramount Studios in Los Angeles, California, United States. (Photo by J. P. Aussenard/WireImage)
'Buffy' cast members Emma Caulfield, Nicholas Brendon, Alyson Hannigan, James Marsters, Sarah Michelle Gellar and Michelle Trachtenberg at the UPN sessions of the Television Critics Association summer press tour at the Ritz Carlton Hotel in Pasadena, Ca. 7/16/01. Photo by Kevin Winter/Getty Images.
370100 07: Nicholas Brendon as Xander Harris stars in 20th Century Fox's 'Buffy The Vampire Slayer Year 5.' (Photo by Online USA)
Nicholas Brendon during The 1999 Radio Music Awards at Mandalay Bay Resort & Casino in Las Vegas, Nevada, United States. (Photo by Ron Galella/WireImage)
Promotional portrait of the cast for the television series, 'Buffy The Vampire Slayer,' c. 1997. L-R: Nicholas Brendon, Anthony Head, Sarah Michelle Gellar, Charisma Carpenter and Alyson Hannigan. (Photo by Fotos International/Courtesy of Getty Images)
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The actor has battled substance abuse in the past. He has been arrested four times this year, and announced last month that he planned on entering a treatment facility.
Brendon posted a photo of himself at a Starbucks on his Facebook Saturday, writing that he was going back to treatment. "It's another beautiful day on this round floating rock we call planet earth," he wrote. "I'm heading back to treatment today to continue #kickingdepressionintheballsack After successfully taking care of some life business."
It's another beautiful day on this round floating rock we call planet earth. I'm heading back to treatment today to...