The UMB World Three-cushion Championship is a professional carom billiards tournament in the discipline of three-cushion billiards, organized mostly annually by the Union Mondiale de Billard (UMB). Until 1953 it was organized by the UIFAB. During a dispute between the UMB and Billiards World Cup Association (BWA), the UMB decided not to organize the championship between 1988 and 1993. Instead the overall winner of the World Cup was announced as also the world champion.

Three-cushion billiards, also called three-cushion carom, is a form of carom billiards. The object of the game is to carom the cue ball off both object balls while contacting the rail cushions at least three times before contacting the second object ball. A point is scored for each successful carom. In most shots the cue ball hits the object balls one time each, although hitting them any number of times is allowed as long as both are hit. The cue ball may contact the cushions before or after hitting the first object ball. It does not have to contact three different cushions as long as it has been in contact with any cushion at least three times in total.