Eleutherodactylus diplasius, the patternless whistling frog, is a species of frog in the family Eleutherodactylidae. A native of Haiti, it can be found in the Tiburon Peninsula northwest, to the Massif de la Hotte. It has an estimated polygon range of about , spanning an elevational range of up to asl. In July 2011 it was found in at Morne Deux Mamelles.