をおかけして申し訳ありません

I'm sorry for causing you trouble

→ を

phrase Rare #39,488

I'm sorry for causing you trouble A formal apology. The noun before を specifies what you caused, such as inconvenience, trouble, or worry.

JA: ご心配をおかけして申し訳ありません。

EN: I'm sorry for worrying you.

I’m sorry for the inconvenience.