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.

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.

The Group A tournament was played in Erzurum, Turkey, from 8 to 14 March 2010.

The Group B tournament was played in Monterrey, Mexico, from 14 to 20 March 2010.