This study aims to identify and compare communication difficulties preceived by perants of children with dawn syndrome,  autism specturm disorder and language impairment, and it targeted children from ages  from 6 - 12 years old according to this the study results shows that matters of communication between the parents of children with ASD and the ones of children with DS and SLI in the domains referring to the attitudes of parents toward their child, the impressions of parents about their own child and about society’s reactions to their child.