Messi is one of the world's most decorated players at club level, but the FC Barcelona superstar is yet to replicate that success with the Albiceleste.
Despite reaching three Copa America finals and winning silver at the 2014 FIFA World Cup, the record six-time Ballon d'Or winner is yet to claim a major international honour with his national team.
The 2020 edition of South America's showpiece tournament provided an opportunity for Messi to break that curse, but his hopes were dealt a blow after the competition was postponed as a result of the coronavirus pandemic.
"Pushing back the Copa America was a huge disappointment, but, of course, it was to be expected and was the reasonable thing to do," Messi told adidas.
"The Copa was going to be a big occasion for me this year, and I was extremely excited to compete in it again. It hit me hard when I learned it would be postponed, but I completely understood.
"We can't dwell on what we're leaving behind this year. It's better to look to the future. To getting back to the daily training routine, to seeing teammates, to playing the first games.
"I'm sure it will be strange at first, but I'm very eager to start competing again!"