Ultimate Fight Night 3 was a mixed martial arts event held by the Ultimate Fighting Championship on January 16, 2006. The event took place at the Hard Rock Hotel and Casino in Las Vegas, Nevada, and was broadcast live on Spike TV in the United States and Canada. The main event between Tim Sylvia and Assuerio Silva was touted as a match to determine the next contender for the UFC Heavyweight Championship, then held by Andrei Arlovski. The two-hour broadcast drew a 1.7 overall rating. The disclosed fighter payroll for Ultimate Fight Night 3 was $183,000.

During the broadcast, UFC President Dana White announced a bout between Matt Hughes and Royce Gracie, which later occurred at UFC 60.