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The 2012 IIHF U18 World Championship Division III was an international under-18 ice hockey tournament organised by the International Ice Hockey Federation. In 2012, a new format was introduced to the IIHF World U18 Championships, therefore Division III now represents the sixth tier of the IIHF World U18 Championships. The Division III tournament was played in Sofia, Bulgaria, from 12 to 18 March 2012.