Baldwin was recognized as Count of Hainault after his mother's return from Rome. He died 1120. Robert le Jeune, Count of Flanders, found when he returned from the Crusade that his father had given to Baldwin III the Chateau of Douai with its dependencies. Not daring to retrieve it by force, he proposed to give Baldwin in marriage to a niece of his wife, and exacted as surety the possession of the Chateau of Douai. When this niece Adelaide of Savoy, later Queen of France, was presented to Baldwin he found her so ugly that he refused to marry her, and thus forfeited Douai. He married Yolande, daughter of Gerald, Count of Guelders, and had Baldwin IV, Count of Hainault, Yolande, Gertrude and Richilda.