The 2008 IIHF World U18 Championship Division III were a pair of international under-18 ice hockey tournaments run by the International Ice Hockey Federation. The Division III tournaments made up the fourth level of competition at the 2008 IIHF World U18 Championships. The Group A tournament took place between 2 and 8 March 2008 in Mexico City, Mexico and the Group B tournament took place between 3 and 9 March 2008 in İzmit, Turkey. Mexico and Serbia won the Group A and Group B tournaments respectively and gained promotion to Division II for the 2009 IIHF World U18 Championships.