This is the 7463rd most frequent Korean word.
출국해
"Leave the country."
출국해요 is used here in the sense of departing from one's country by traveling abroad, describing an action taking place soon in the near future.
저희는 이번 주말에 출국해요.
We are leaving the country this weekend.
출국해야 했어요 signifies a compulsory departure from one's country as required by a specific reason, in this case pertaining to work obligations.
그는 회사 명령으로 갑자기 출국해야 했어요.
He suddenly had to leave the country due to a company order.
출국해 싶다면 implies a voluntary desire to travel abroad, referring to personal choice or intention to leave one's country.