YOU SAID:

I got my third leg removed

INTO JAPANESE

3本目の脚を取り外してもらいました

BACK INTO ENGLISH

I had my third leg removed.

INTO JAPANESE

3本目の足を外されました。

BACK INTO ENGLISH

My third leg was removed.

INTO JAPANESE

私の3番目の足は取り除かれました。

BACK INTO ENGLISH

My third leg was removed.