Zillgitt relayed the news from USA Basketball Chairman Jerry Colangelo.
Colangelo on Monday announced the 19-man roster for the USA Men's National Team. Only 12 players will be selected for the World Cup, which is being held in Spain and runs from Aug. 30 to Sept. 14.
"I've always heard great things about it," Aldridge said then. "It's a great experience to have, and you learn a lot of things from it. I am looking forward to it."
Aldridge, 28, averaged 23.2 points and 11.1 rebounds last season for the Portland Trail Blazers, who won 54 games and earned the No. 5 seed in the Western Conference before falling to San Antonio in the second round of the playoffs.
The three-time All-Star will become a free agent next summer, but is expected to sign a maximum contract extension to stay in Portland.
Jerry Colangelo said LaMarcus Aldridge told USA Basketball he's not available for FIBA World Cup. Could be last straw for Aldridge/re: USAB — Jeff Zillgitt (@JeffZillgitt) July 14, 2014
Now, Aldridge doesn't want to play, which is fine. His call. But don't expect him to get much consideration for 2016 Olympics. (2/2) — Jeff Zillgitt (@JeffZillgitt) July 14, 2014