This systematic review aims to synthesise the research on children’s perceptions and experiences of their involvement in a parent’s mental health care. After an extensive search and quality appraisal, 22 articles remained and were included in the review. The results show that children—although resourceful and with good intentions—frequently felt excluded. They hungered for information and felt their questions were abandoned. They also felt caught in a tumultuous life situation and struggled for support. Finally, they expressed the need to be seen and ultimately did not feel involved in their parent’s mental health care.