1Unfortunately — used to express regret or to say that circumstances are not favorable; often used as a polite lead-in before a refusal or bad news.
あいにく今日は都合が悪くて参加できません。
Unfortunately I can't attend today; it's not a good time for me.
あいにく雨が降ってきたので、ピクニックは中止になった。
Unfortunately it started to rain, so the picnic was canceled.
あいにくその商品は在庫切れです。申し訳ございません。
Unfortunately that item is out of stock. I'm very sorry.
電話をかけたが、あいにく部長は席を外していた。
I called, but unfortunately the manager was away from his desk.