3000 BC would be early Harappan, pre-Aryan Dravidian, I think.
Yup, a long, long time ago; the script (which remains heavily studied, but not conclusively deciphered) appears to conceal an unknown agglutinative language, and Dravidian is agglutinative, but that’s not exactly a four leaf clover in Asia. :’) Years ago I recall reading that the Aryans referred to the dead in the Harappan cities as “monkey men”, due to smaller stature and dark skin, a description which might be applied to, uh, some folks in India today.