Immigration detention of children is a common practice in many countries around the world. The overall negative effects of deprivation of liberty on children are severe, long lasting and well documented, impacting on their development and wellbeing. Children should be treated as children first and foremost. However, care arrangements and other non-custodial measures are rarely searched for and available for children in the immigration context worldwide. UNHCR proposes technical assistance and capacity building to countries to divert from systematic immigration detention of children to quality care arrangements and other non-custodial solutions. Unaccompanied or separated children should not be detained, criminalized or subject to punitive measures because of their own or of their parents´ migration status. Children need attention in alignment with their best interest. This is why appropriate care arrangements have to be in place to address their specific needs.