Devendro represented India at the 2012 Summer Olympics and lost out in the quarter-finals in a tough bout against the eventual bronze medalist Irish boxer Paddy Barnes.

[6] Devendro was born in Imphal West district, Manipur, India, to parents Jugindro Singh and Maklembi Devi.

92 places were reserved from World Amateur Boxing Championships, held in Baku, Azerbaijan from 22 September 2011 to 10 October 2011, from which the top 10 pugilists from different National Olympic Committees in each weight class qualified for the Games.

[10] Devendro earned the Olympic berth after reaching at the quarter-finals, where he lost to South Korean opponent Shin Jong-Hun by a points difference of 16 to 28.

He received special guidance on training and competition diet from Mrs. Aradhana Sharma (sports nutritionist) who works for Indian Army's Mission Olympic Wing in Pune.

[15] Devendro was presented with Vishisht Seva Medal for distinguished service at an investiture ceremony at the Eastern Army headquarters.