The prevalence of fetal alcohol spectrum disorder (FASD) has been reported to be disproportionately high among children in foster care compared with the general population. However, updated prevalence estimates of infants and children with FASD in foster care or the prevalence of placement of children with FASD in foster care make this unclear. This study examines two questions. Firstly, what is the prevalence of FASD among infants and children in foster care? Secondly, what is the likelihood of placement in foster care for infants and children with FASD? This review was designed using PRISMA‐SCR and JBI scoping review guidelines. Three databases were searched for the period June 2012 to June 2023: PubMed, Cumulative Index to Nursing and Allied Health Literature (CINAHL), and Google Scholar for all countries. Overall prevalence estimates were calculated using a complementary log–log link model along with 95% confidence intervals. Firstly, the estimated prevalence of FASD among infants and children in foster care was 18.8%. Secondly, among children diagnosed with FASD 30.5% are placed into foster care, reflecting greatly increased risk of placement of infants and children with FASD in foster care. We conclude that routine screening for FASD is needed to improve the identification of infants and children with FASD. Increased attention is also needed on developing strategies for FASD prevention. Recognition that nearly one of every three children with FASD will enter foster care demonstrates the need for increased funding, enhanced training and greater availability of services for families and children impacted by FASD.