Was scare tactics the television show cancelled?

Scare Tactics was a reality hidden-camera show broadcast on Syfy from October 1, 2003 to March 16, 2013. The show was originally hosted by Shannen Doherty and Tracy Morgan for the first two seasons. Beginning with the third season, Morgan left the show and Doherty became sole host. The show is produced by Lionsgate Television.

The series consists of hidden cameras capturing victims being terrorized by professional actors disguised as serial killers, ghosts, monsters, extraterrestrial visitors and paranormal entities. The show's victims' permission to air the footage is obtained on-camera at the conclusion of each clip, after revealing to them the hoax.

On March 5, 2019, Syfy announced that a revival of Scare Tactics was in development. The revival premiered on December 2, 2019, with original host Shannen Doherty returning to host.

So the answer is no, Scare Tactics was not canceled.