Dysprosium(III) selenide is one of the selenides of dysprosium, with the chemical formula of Dy<sub>2</sub>Se<sub>3</sub>.
Dysprosium(III) selenide can be prepared by reacting dysprosium(III) oxide or dysprosium(III) chloride with hydrogen selenide:
It can also be obtained by reacting the elements at high temperatures:
Dysprosium(III) selenide reacts with arsenic triselenide to obtain DyAsSe<sub>3</sub>.