The men's 3000 metres steeplechase at the 2012 World Junior Championships in Athletics was held at the Estadi Olímpic Lluís Companys on 13 and 15 July.
Prior to the competition[update], the existing world junior and championship records were as follows.
Qualification: The first 4 of each heat (Q) and the 4 fastest times (q) qualified
According to an unofficial count, 30 athletes from 23 countries participated in the event.