I won't be able to do it right away. I hope you understand.
Something has come up, so I won't be able to deal with this too soon.
この場合、次のような言い方ができますよ。
ーI won't be able to do it right away. I hope you understand.
「すぐにはできません。ご理解ください」
ーSomething has come up, so I won't be able to deal with this too soon.
「事情があってすぐに対応することができません」
ご参考まで！
カナダ 
