BackgroundRacial and ethnic disparities in mental health service utilisation and access is well established. Mental illness is common among Arab populations globally, but most individuals display negative attitudes towards mental health and do not seek professional help. The aim of this systematic review was to determine 1) help-seeking behaviours 2) help-seeking attitudes and 3) help-seeking barriers and facilitators, related to mental health services among Arab adults.MethodA pre-defined search strategy and eligibility criteria allowed for database searching using terms related to: mental health, Arabs, help-seeking, as well as experiences and behaviours. Seventy-four articles were included and analysed through narrative synthesis. Results were reported using the PRISMA guidelines. The review protocol was registered prospectively on PROSPERO (CRD42022319889).ResultsArabs across the world have negative attitudes towards formal help-seeking and are reluctant to seek help, despite the presence of psychological distress. There is little information on factors that influence help-seeking behaviours and rates of service use. Preference for informal help sources such as family and friends were expressed and considered more acceptable. Low mental health literacy, stigma, gender, age, education, religion, acculturation, and immigrant status were the most common factors influencing help-seeking attitudes. Barriers to help-seeking included stigma, privacy and confidentiality, trust, mental health literacy, language, logistics, and culture related barriers. Increasing societal and family awareness, external support and encouragement, shared culture between the client and therapist, quality of doctor patient relationship, and feelings of connectedness with the host country among refugees were mentioned facilitators. Mixed findings for the role of religion, and family and community, in relation to facilitating or hindering help-seeking were reported.ConclusionsThere is an increased likelihood and preference to seek informal sources of psychological support among Arabs. Contextual and cultural factors impeding help-seeking for Arabs are common across the world. Future research should address actual utilisation rates of services to better understand factors that influence help-seeking behaviours and facilitators to help-seeking. Increasing mental health literacy and developing anti stigma campaigns is necessary. Developing culturally informed interventions should inform future efforts to promote help-seeking among this population.Supplementary InformationThe online version contains supplementary material available at 10.1186/s12888-023-04827-4.