Lethata irresoluta is a moth of the family Depressariidae.

It is found in Peru.

The forewings are fulvous with the costa narrowly deep ochreous underlined with purplish from the base to the apical three-fourths and from the apical three-fourths to the tornus deep yellow.

The dorsum is irregularly edged with grey and there is a purplish spot at the end of the cell.

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