During summer 2011 Mustapha Yatabaré moved to the Ligue 2 side EA Guingamp. The malian striker, scoring no goal, did not succeed his first season.
At the beginning of the season 2012/13, he striked eight goals within the ten first games, scoring successional five time from the sixth to the tenth game. He finished that season Ligue 2 top scorer, with 23 goals and contributed to the promotion of the Breton club into the Ligue 1
In November 2008, Yatabaré earnt him a call up to the Mali national team following his impressive club displays. He made his international debut on 19 November 2008 against Algeria in Rouen, with the score finishing 1–1. On 10 January 2010, in the opening game of the 2010 African Cup of Nations, he scored a dramatic equaliser, as Mali came from 0–4 down to draw 4–4 with Angola.