Mawthoh competed in the 48kg category of the Under-16 full contact sports, which was held from September 6-14 at Rimini, where he bagged a bronze, Meghalaya Association of Kickboxing Organisations (MAKO) secretary Larry P Warjri said.
Mawthoh lost to Roman Synyaev of Russia who went on to bag gold at the championship.
He is one of the six cadets sent from the state to compete in the world stage, the official said.
Mentored by MAKO coach Donny Ranee, Mawthoh is a promising player, who had earlier also won a number of medals and trophies for Meghalaya at different regional and national level championships.
Ranee led the 18-member Indian contingent, five of whom were from Meghalaya, to the Championship.