Olympian Thomas Fraser-Holmes has been banned from competing for 12-months after missing a series of drug tests.
The Australian Swimmer will almost certainly miss the 2018 Commonwealth Games as a result.
Fraser-Holmes won the 200 metre freestyle at the Glasgow Commonwealth games - as well as competing in Rio in 2016.
He missed two tests when he was between coaches after the Olympics, before arriving 10 minutes late to a third test.
"I'm not running away from anything," Fraser-Homes told Fairfax media.
"I made the mistake of not being home," Fraser-Holmes said after the FINA breaches were revealed.
"I'm guilty of a human error, of pretty much just spending some time with my family. Just as normal families do we were just chit-chatting away and it got to five to nine and I realised what time it was.
"The only thing I could do was to change my whereabouts time to 15 minutes later. I didn't know there were drug testers there. I had no way of knowing until a couple of weeks later I had the email that I'd missed the test."
Fraser-Holmes can appeal the finding at the Court of Arbitration for sport.