Abstract
Extended family members play an important role in meeting the care needs of autistic individuals, yet family support policies and practices often overlook this role. We aimed to synthesise qualitative research on the role played by extended family members in the lives of autistic individuals and their parents and identify cultural patterns. We searched eight databases and selected relevant studies through a two-stage screening process. We synthesised the results and discussions described in the selected studies using template analysis. The review included 42 studies (40 qualitative; 2 mixed methods), reporting on 1048 parents and 2140 grandparents. While aunts, uncles, and cousins were not direct participants, their roles were described in participants' narratives. Three main themes were developed: (1) types of support from extended family members, including emotional, financial, instrumental, and informational support; (2) unhelpful or lack of support from extended family members, including misunderstanding about autism, absence of support with caregiving, and negative attitudes and discriminatory behaviours against autistic individuals as well as their parents; (3) factors influencing the role of extended family members, including individuals, family unit, family interaction characteristics, and a journey towards acceptance and cultural influences. Novel findings on the influence of culture suggested in cultures highly valuing family interdependence, extended relatives play a more prominent support role, yet the emphasis on family reputation might hinder the acceptance of autism by extended relatives. Based on a family systems approach, we recommend priorities for intervention development and clinical practice to support the effective involvement of extended family members.