Aristotelia iomarmara is a moth of the family Gelechiidae. It was described by Edward Meyrick in 1921. It is found in Australia, where it has been recorded from Queensland.
The wingspan is about 8 mm. The forewings are light ochreous grey, irregularly sprinkled and strigulated with darker grey, with strong purple reflections. The second discal stigma is dark grey. The hindwings are light grey.