Sevim Dagdelen has been a Member of the German Bundestag since 2005. She is the spokeswoman for the Left Party parliamentary group on the Bundestags Committee on Foreign Affairs, a deputy member of the Defence Committee and spokeswoman for international policy and disarmament. From 2017 to 2020, she served on the executive committee of the Left Party parliamentary group as vice chair. Sevim Dagdelen is a member of the NATO Parliamentary Assembly and a deputy member of the Parliamentary Assembly of the Council of Europe.