Kashtiliash III
| Kaštiliašu III | |
|---|---|
| King of Babylon | |
| Reign | c. 1500 BC |
| Predecessor | Burnaburiaš I |
| Successor | Agum III |
| House | Kassite |
Kaštiliašu III, phonetically inscribed in cuneiform as mKaš-til-ia-šu, was a possible Kassite king of Babylonia in the 15th century BC (Short Chronology). He is known only from the Assyrian Synchronistic King List, a copy of a monumental inscription, his genealogy, and references in the Chronicle of Early Kings.