The defender, who had previously represented England C, started for The Reggae Boyz as they took on the USA at the Stadion Wiener Neustadt.
It was the USA who dominated the meeting between two sides building up to the autumn's CONCACAF World Cup Qualifiying campaign. Barcelona right-back Sergiño Dest curled home a superb opener on 34 minutes with Brenden Aaronson tapping in a second after the break.
Ethan's debut ended just past the hour mark, shortly before Swansea City striker Jamal Lowe pulled one back for Theodore Whitmore's men. However, a late Sebastian Lletget double sealed the win for the USA.
Last night's appearance made Ethan the ninth member of our current squad to play international football while in TW8. The 27-year-old now returns to West London ahead of our Easter Saturday trip to Huddersfield Town.
In Tel Aviv, Christian Nørgaard played the dying minutes of Denmark's 2-0 win over Israel in their 2022 World Cup Qualifying opener. Mathias Jensen was also named on the bench while Henrik Dalsgaard was not included in the matchday squad.
Martin Braithwaite gave The Danes a 13th minute lead which Jonas Wind doubled midway through the second-half. That was how it stayed with Christian coming off the bench in the 88th minute to earn his second cap.
Denmark will look to add another three points to their tally on Sunday when they host Moldova in Herning, kick-off 5pm.