Wasi-wari is part of the Nuristani branch of the Indo-Iranian languages, which show both Iranian and Indo-Aryan influences, but are otherwise not closely related. Nuristani languages were formerly considered to be Dardic languages, however, they are dissimilar enough from the other Dardic languages to constitute their own branch of the Indo-Iranian language tree.
The Wasi-wari language falls within the Nuristani branch of the Indo-Iranian linguistic family, marked by its distinct combination of Iranian and Aryan elements that differentiate it from other languages in the same linguistic tree.