Europium(III) selenide is an inorganic compound with the chemical formula Eu<sub>2</sub>Se<sub>3</sub>. It is one of the selenides of europium. It can be obtained by the reaction of selenium and europium at high temperature. It co-melts with germanium diselenide to form Eu<sub>2</sub>GeSe<sub>5</sub> and Eu<sub>2</sub>Ge<sub>2</sub>Se<sub>7</sub>. It reacts with uranium and uranium diselenide at high temperature to obtain EuU<sub>2</sub>Se<sub>5</sub>.