Stenoma deltomis is a moth of the Depressariidae family. It is found in Brazil (Amazonas). The wingspan is about 33 mm. The forewings are iridescent whitish-grey with the costal edge ochreous-white from the flap. The stigmata are grey, the plical obliquely beyond the first discal. There is a strongly curved series of cloudy greyish dots from towards the costa at three-fifths to near the dorsum at three-fourths, interrupted in the middle by a round cloudy light grey-brownish spot. There is a strongly curved subterminal series of fuscous dots, sinuate inwards towards the costa and a terminal series of blackish-grey dots. The hindwings are light grey, becoming light greyish-ochreous towards the apex.