The AU said the suspension would remain in place until civilian rule in the country is restored, and that it would assess the implications of a military intervention in Niger.
The African Union (AU) said it suspended Niger on Tuesday after a coup by the West African state's military in late July.
The AU also reiterated calls for the coup leaders to release elected President Mohamed Bazoum and stand down.
It called on all member states to "reject this unconstitutional change of government and to refrain from any action likely to grant legitimacy to the illegal regime in Niger."
