GA3

GA3 may refer to:
 * George Atkinson III (1992–2019), American football player
 * Georgia's 3rd congressional district, a congressional district in the U.S. state of Georgia
 * Georgia State Route 3, a north–south highway in the U.S. state of Georgia
 * GA3, Gibberellic acid, a form of the gibberellin plant hormone
 * Trumpchi GA3, a 2013–2019 Chinese subcompact sedan