Stenoma unguentata is a moth in the Depressariidae family. It was described by Meyrick in 1930. It is found in Brazil (Para). The wingspan is 22-23 mm. The forewings are whitish-violet with the costal edge pale ochreous-yellowish from the base to two-thirds, edged with greyish-violet suffusion beneath and with a fine greyish-violet straight shade from two-fifths of the costa to the middle of the dorsum, the plical stigma forming a faint spot on it. The second discal stigma is cloudy and violet-grey. The hindwings are grey-whitish strewn with violet-grey hairscales except towards the base.