The 2017 IIHF World U18 Championship Division III was two international under-18 men's ice hockey tournaments organized by the International Ice Hockey Federation.

The Division II A and Division II B tournaments represent the sixth and the seventh tier of the IIHF World U18 Championship.

The Division III A tournament was played in Taipei, Taiwan, from 21 to 27 March 2017.

[1] 4 referees and 7 linesmen were selected for the tournament.

(National Standard Time – UTC+8) The Division III B tournament was played in Mexico City, Mexico, from 17 to 19 March 2017.