The Roma national minority represents a bilingual population and speaks the majority language (Croatian) as a second language. It often negatively affects the academic success of this population. For many reasons, this population is at risk of intellectual disabilities that often affect language abilities, and consequently narrative abilities. Narrative microstructure gives us information about the lexical and grammatical structures that a person produces. The aim of this study is to gain insight into the differences in narration between Roma children with mild intellectual disabilities and control groups on measures of syntactic complexity in Croatian as the second languagues of Roma children. Three groups participated in this research: Roma children with intellectual disabilities, a control group equalized according to chronological age and a control group equalized according to language age. MAIN was used as the measuring instrument. The results indicate that there are statistically significant differences between the Roma children and both control groups on the measures of the mean lenght of the communication unit and the mean lenght of the clause, and between Roma children and the control group according to the chronological age on the measures of the clausal density and the number od syntactic errors. Roma children produce shorter communication units and clauses, greater number of syntactic errors and they do not produce complex dependent sentences. Similar results of Roma children and the control group according to language age on the measures of the clausal density and number of syntactic errors can be explained by weaker mastery of the grammar of the Croatian languages, lower intellectual status of Roma children, as well as their language experience. In the case of Roma children with intellectual disabilities, intervetion is necessary in the area of language development, more specifically, in narrative skills. In SLP support it is necessary to encourage the development of skills in both languages.