Renard III, also spelled Reynald, Raynald, Rainard or Renaud (died c. 1230), was the acting lord (or count) of Dampierre-en-Astenois from 1202 until his death.
Renard himself many several grants, always respecting his father's right to confirm or revoke them if and when he returned from captivity overseas.
The grant of the tithes and revenues from the fairs of Le Vieil-Dampierre to the abbey of Chatrices was confirmed by his father and ratified by Count Theobald IV of Champagne, their suzerain, in 1234.
In 1218, Renard III, calling himself "Jerusalem bound" (Hierosolimam profecturus), granted the tithes of Remicourt and the produce (terrage) of Sommeille to the abbey of Monthiers-en-Argonne, specifying that if his father did not approve these gifts, then the Countess Blanche, who confirmed the grant, could make good on the gift out of her own lands.
Although a minor, he succeeded to the acting lordship under the regency of his uncle Anselm, until the return of Renard II in 1233.