Uranium(III) bromide is an inorganic compound with the chemical formula UBr3.

It is radioactive.

Uranium(III) bromide can be obtained by the reaction of uranium metal or uranium(III) hydride and hydrogen bromide,[1] or it can also be prepared by the thermal decomposition of NH4UBr4·1.5CH3CN·6H2O.

[2] It is difficult to synthesize due to its rapid oxidation in both water and air.

[3]