Despite the growing prevalence of ASD worldwide, there are disparities to diagnosis and treatment services especially for racial and ethnic minorities in the U.S. and low and middle-income countries (LMIC). The purpose of this panel is to share research on the utility of diagnostic and screening tools for culturally diverse communities and examine cultural differences in diagnosis and services in U.S. Latino populations and two LMIC countries, Bangladesh and South Africa. The panel will consist of four papers and Dr. Diana Robins will serve as the discussant. The first paper examines the processes of culturally adapting the ADOS-2 and ADI-R in rural Bangladesh and the use of the Social Communication Questionnaire. The second paper qualitatively analyzes contextual factors and acceptability of a caregiver-mediated early ASD intervention in South Africa. The third paper evaluates the utility of the Spanish ADI-R in distinguishing between ASD and DD in a U.S. based Latino population. The final paper surveys whether there are ethnic disparities between Latino and White children with ASD in specialty autism-related services, and whether condition severity moderate the relationship between ethnicity and receipt of autism services.