Helcystogramma fuscomarginatum is a moth in the Gelechiidae family. It was described by Ueda in 1995. It is known from Japan, Korea and China (Guangdong). The wingspan is about 12 mm. The forewings are yellow with narrow dark brown streaks at the middle of the cell, along the fold and all veins. The larvae feed on Oplismenus undulatifolius.