Purpose: Diagnoses, assessments, and treatments, as well as social and language interventions, can be effective in identifying and interpreting specific linguistic features that present special challenges to the language abilities of individuals who are deaf and hard of hearing (DHH). This article reports on a study analyzing complex sentences and morphosyntactic error production by Arabic-speaking adolescents who are hearing and DHH. Method: A total of 124 adolescents participated, all native speakers of Arabic in Grades 6-10 (63 hearing and 61 DHH). The participants were asked to provide an oral narrative about a dangerous experience. Results: Both groups produced a low mean percentage of complex sentences out of the total number of clauses. However, adolescents who are DHH produced significantly fewer complex sentences and more morphosyntactic errors when compared with their hearing peers. The most common errors produced by both groups were clause errors including omission of subject or predicate and errors in word order. Determiner errors were produced significantly more often by adolescents who are DHH. Conclusions: To our knowledge, this study is one of the first to investigate morphosyntactic aspects of complex sentences and morphosyntactic errors produced by Arabic-speaking adolescents who are hearing and DHH. This study therefore has significance for further research on language development among Arabic speakers and on definitions of vulnerable linguistic aspects in DHH.