Mendes (13-1) will enter the fight riding a two-bout win streak. In his most recent bout on Dec. 14, Mendes knocked out Yaotzin Meza in the first round.
His lone professional loss occurred Jan. 14 in a title bout against champion Jose Aldo. Mendes was knocked out in the opening round.
Gamburyan (12-7) snapped a three-fight skid Aug. 4 with a unanimous decision over Michihiro Omigawa.
The five-round fight between Rousey and Carmouche marks the first time women will compete in UFC.