We finally have the official announcement from Toei Animation regarding the World Trigger anime . The work by author Daisuke Ashihara will be getting a third season.
During the announcement, the official trailer for the new season was also released, confirming the return of the original cast from the first seasons.
Finally, the manga began serialization in 2013 in Weekly Shonen Jump. From 2014 to 2016, the manga inspired a 73-episode anime series by Toei Animation.
Via: Official Website