The NBA has not granted Cleveland Cavaliers guard Jordan Clarkson permission to participate in the 2018 Asian Games for the Philippines.
NBA spokesman Tim Frank explained the decision in the league's statement (h/t ABS-CBN News):
"The NBA's agreement with FIBA stipulates that NBA players can participate in the Olympics, the FIBA Basketball World Cup, Continental Cup competitions, and associated qualifying tournaments. Because the Asian Games are not one of those competitions, NBA players are unable to participate. In accordance with the NBA's agreement with FIBA, Jordan is welcome to represent the Philippines in the agreed-upon competitions.