Shantil III was the inhabited third planet in its star system. This was the homeworld of an intelligent species. It was in the same sector as El-Adrel IV, Kanda IV, Malindi VII, and Razna V.
It was the site of a mytho-historical drama, in which the characters Darmok and Jalad faced a common foe on the island-continent of Tanagra, and achieved mutual understanding in the process. The story was later incorporated into the Tamarian language. (TNG: "Darmok")
This planet was only mentioned in dialogue.
According to the script, the pronunciation for Shantil was "SHAHN-til".