It may have been a go-around/missed approach, however I had never seen any other aircraft fly that low. As far as I could tell it was going the normal landing speed, as I couldn’t tell the flap position. It was possibly trying to intercept the localiser low, however, as I said. It was the only one. Foreign, unfamiliar pilots obviously wasn’t an issue as it was a WestJet plane. As well, it most likely wasn’t a go-around because it was going the approaching side, not the takeoff heading, and this is about 12 km from the runway, by which point sfter doing a full circle they should have gotten their altitude straightened out.