Levan III Dadiani (Georgian: ლევან III დადიანი), born Shamadavle (შამადავლე) (died 1680) was Prince of Mingrelia, of the House of Dadiani, from 1661 to 1680. His reign unfolded against the background of a series of civil wars in western Georgian polities, in which Levan III was an opponent of King Bagrat V of Imereti to whom he lost a battle and his own wife.