Technically the show wasn't cancelled. There are however several episodes lingering around that was never released which may be released at a later date, considering how abruptly season 3 ended. However, Jason "Mayhem" Miller's contract apparently ran out with the show according to himself in an interview and this allowed him to focus more on his own fighting career. Wheather or not he'll renew his contract with Bully Beatdown and appear in a season 4 remains to be seen, as he did not mention any plans to renew it.
People are wondering about season 4 of Bully Beatdown. I don't know if it is canceled or not, BUT GOOD NEWS Jason Mayhem Miller will be the coach on The Ultimate Fighter. So we can see him each week on Spike TV. Plus he will be fighting Bisping after the show.
Bully Beatdown - 2009 Jonathan The Rollerblade Bully 1-4 was released on: USA: 12 April 2009
Bully Beatdown - 2009 The Royal Rumble 3-4 was released on: USA: 2 December 2010
Bully Beatdown - 2009 Get the Poison Out 3-1 was released on: USA: 4 November 2010
Bully Beatdown - 2009 Nathan The Big Nasty 2-4 was released on: USA: 17 September 2009
Bully Beatdown - 2009 Brett Hazard A Bully Finds Religion 3-11 was released on: USA: 4 October 2012
The winter half (season 4 ) will start in 2010(feb)
Season 4 of what?
Bad Movie Beatdown - 2009 The Cavern 4-24 was released on: USA: 30 October 2012
Swamp Men - 2010 Gator Beatdown 2-4 was released on: USA: 31 October 2011
Bad Movie Beatdown - 2009 Doomsday 4-23 was released on: USA: 25 October 2012
Bad Movie Beatdown - 2009 Stealth 4-27 was released on: USA: 17 December 2012