Stenoma iatma is a moth of the Depressariidae family. It is found in French Guiana. The wingspan is 21-23 mm. The forewings are pale whitish-fuscous tinged with violet and with the costal edge yellow-whitish. The stigmata are dark violet-fuscous, the first discal indistinct, the plical obliquely beyond it, the second discal transverse. There is a small dark violet-fuscous spot on the costa beyond the middle and a large subtriangular dark violet-fuscous spot on the costa towards the apex, where a slightly curved tine fuscous line runs to the tornus. There is also a terminal series of rather large blackish dots. The hindwings are whitish-ochreous, towards the apex yellowish-tinged.