Guy III of Mouzon

Guy III was the thirty-fourth regular abbot of Notre-Dame de Mouzon. On 23 May 1354 he swore the abbey's fealty in Reims to Humbert, the former dauphin of Viennois, who had become archbishop of Reims.

Humbert died on 20 January 1355. Guy himself died on 30 January, the year being unrecorded, and his successor Pierre III Hazard is first documented only in 1360.