Judgment of the Court (Fourth Chamber) of 3 June 2021.#BZ v Westerwaldkreis.#Request for a preliminary ruling from the Bundesverwaltungsgericht.#Reference for a preliminary ruling – Area of freedom, security and justice – Immigration policy – Return of illegally staying third-country nationals – Directive 2008/115/EC – Article 2(1) – Scope – Third-country national – Criminal conviction in the Member State – Article 3(6) – Entry ban – Grounds of public policy and public security – Withdrawal of the return decision – Lawfulness of the entry ban.#Case C-546/19.