Terbium(III) bromide (TbBr<sub>3</sub>) is a crystalline chemical compound.
Terbiun(III) bromide can be produced by heating terbium metal or terbium(III) oxide with ammonium bromide.
A solution of terbium(III) bromide can crystallize as a hexahydrate. When heating the hexahydrate, it will dehydrate and produce some terbium oxybromide (TbOBr).
Terbium(III) bromide is a white solid that is soluble in water. Its crystal structure is the same as bismuth iodide.