PURPOSE: to check the influence of severity arising from the phonological disorder related to semantics and morphosyntax. METHOD: the sample consisted of 14 children aged between 4:0 and 7:0 years, with phonological disorder. We carried out the child's phonological assessment, and the phonological disorder was classified according to the Percentage of Correct Consonants Revised, based on the Percentage of Correct Consonants, which classifies the severity of the phonological disorder in mild, mild-moderate, moderate-severe, and severe. We found that four subjects showed mild disorder, four showed mild-moderate disorder, three showed moderate-severe disorder, and three showed severe disorder. After this procedure, the children were exposed to morphosyntax and semantic evaluation, through the research on the average values of phrase, in which they collected phrases from three different language modalities: describing a picture, telling a story, and answering questions. The five phrases the children first spoke were punctuated according to their complexity. Next, we accomplished the statistical analysis through the Kruskal-Wallis non-parametric test. The significant p value is considered p<0.05. RESULTS: there was no statistical significant difference among the different degrees of severity of the phonological disorder in the three evaluated language modalities, as related to the morphosyntax, semantics, total of construction, and total of length. CONCLUSION: we can conclude that the severity of the phonological disorder does not affect the children's performance regarding morphosyntax and semantic development, because there was no statistical significance among the results. Therefore, we may suggest that other studies should be carried out in order to confirm or not such results.