Consulate — a foreign government's office in another country that handles matters such as protection of its nationals and visa issuance.
パスポートを紛失したので領事館に連絡した。
I contacted the consulate because I lost my passport.
領事館は旅行者に必要な書類の手続きを手伝ってくれる。
The consulate helps travelers with necessary paperwork.