The intelligence assessment of deaf and hard-of-hearing students has been a challenge for Brazilian psychologists, due to the lack of standardized and validated instruments for this population. The objective of this study was to assess the intelligence of deaf and hard-of-hearing students with the Test of Nonverbal Intelligence, Third Edition (TONI-3: Forma A) according to external variables: age, education, gender, type of deafness, use of hearing aid and communication mode. Study participants were 205 deaf students of both genders, with an average age of 14 years, from four public schools, ranging from elementary to middle school. Results showed no significant differences between subjects according to gender, type of deafness and communication mode. There was an increase in test scores with increasing age, grade and differences between students that used hearing aids. Thus, the findings demonstrate the validity of the TONI-3 to assess the intelligence of Brazilian deaf students.