The 2010 IIHF World U18 Championship Division III was an international under-18 ice hockey competition organised by the International Ice Hockey Federation. Both Division III tournaments made up the fourth level of the IIHF World U18 Championships. The Group A tournament was played in Erzurum, Turkey, and the Group B tournament was played in Monterrey, Mexico. China and New Zealand won the Group A and B tournaments respectively and gained promotion to the Division II of the 2011 IIHF World U18 Championships.