Henry III of Bar (French: Henri III de Bar; German: Heinrich III von Bar 1259 – Naples, September 1302) was Count of Bar from 1291 to 1302. He was the son of Theobald II, Count of Bar and Jeanne de Toucy.His introduction to military life came as he was made a knight in a conflict between his father and the Bishop of Metz. He then served Frederick III, Duke of Lorraine.