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
• United Nations General Assembly Third Committee, one of the six committees of the United Nations General Assembly