Tethea trifolium is a moth in the family Drepanidae.

[1] It is found in China (Heilongjiang, Jilin),[2] the Russian Far East and Japan (Hokkaido, Honshu).

The habitat consists of various types of mixed and broad-leaved forests.

The larvae feed on Malus mandshurica and Prunus avium.

This article on a moth of the subfamily Thyatirinae is a stub.