The Coupe only arrived at US dealerships in 2012, initially as a 2013 model, and it was recently updated at the 2013 Los Angeles Auto Show, with Hyundai adding a more powerful 2.0-liter engine as standard (it was optional in other Elantra models). Considering its short run, though, we're guessing that even a quick update couldn't cure the slow sales that are likely at the root of the two-door's discontinuation. The Elantra Coupe should remain on sale in the Canadian market, according to Driving.ca.
We've reached out to Hyundai for official confirmation and a cause of death for the Coupe. When we hear back, we'll be sure to update you.
UPDATE: Hyundai spokesman Jim Trainor confirmed the discontinuation of the Elantra Coupe, telling Autoblog, "It was a niche player for us and we're going to turn our attention on the Elantra sedan and Elantra GT."