Praseodymium(III) iodide is an inorganic salt, consisting of the rare-earth metal praseodymium and iodine, with the chemical formula PrI3.

[5] Praseodymium(III) iodide forms green crystals, which are soluble in water.

[5] It forms orthorhombic crystals which are hygroscopic.

[1] It crystallizes in the PuBr3 type[6][7] with space group Cmcm (No.

[8] It decomposes through an intermediate phase 2 PrI3·PrOI to a mixture of praseodymium oxyiodide and praseodymium oxide (5 PrOI·Pr2O3).