Something has come up.

I'm supposed to go for a swim event at the beach this Sunday. But the event was canceled due to the typhoon.
 A huge typhoon will hit us soon !


What are you doing this weekend?
Why don't you go play outside with your kids?
(with your friends, with your family. with your wife)
 Well, I was supposed to go to the gym.
 But something has come up at work.
 I won't be able to make it.

Something has come up.

「意味」ちょっと用事ができてしまって。

※約束していたことを断ることになった場合によく使うフレーズ。

以下のようにat ...を付けて，どこで用事ができたかを示す場合があります．

Something has come up at work.「ちょっと仕事で用事ができてしまって。」

Something has come up at home.「ちょっと家で用事ができてしまって。」

「英語例文」
I'm very sorry, something has come up and I won't be able to attend the meeting.「たいへん申し訳ないけど，ちょっと用事ができてしまって，会議に出席できないんだ。」