Many European countries are becoming multicultural at a previously unseen rate. The number of immigrants including refugees has considerably increased since 2008, and especially after the beginning of the war in Syria. In 2015, 88,300 unaccompanied minors sought asylum in the Member States of the European Union (EU) and most came from Syria, Afghanistan, Iran, Iraq, Somalia and Eritrea. As a reaction to increased immigration, governments in many countries including Germany, Sweden and Norway implemented more restrictive immigration policy. A requirement for all countries, however, is the protection and welfare provision for all arriving children, regardless of their nationality, ensured by international and national legal frameworks. This paper provides an overview of the post 2015 immigration crisis in key European countries with a special focus on current demographics, refugee children, mental health studies, policies and practical support available for refugees.