The daily Diario AS on Wednesday said that Forlan, who plays for Atletico Madrid in the Spanish La Liga, has been dealing with “a physical fitness issue” and decided to stay in Spain and rest.
Forlan will rejoin Uruguay when it visits China for a friendly on Tuesday.
The 31-year-old striker scored five goals in the World Cup in June and won the Golden Ball as the tournament’s best player.
Prior to the AS report, the National Team Body (BTN) on Wednesday morning said it could not confirm if Forlan had joined the Uruguay team.
The Uruguay players arrived in Jakarta on Tuesday night.
“I called Atletico Madrid earlier today and the club said that he [Forlan] had left for Indonesia. I’m still sure he’ll come and play on Friday,” BTN chairman Iman Arif said.
Football officials on Wednesday said the three Dutch players scheduled to suit up for Indonesia against Uruguay might not be fielded because of FIFA regulations, dealing a second blow to the highly anticipated match.
“We received an official notification from FIFA today, stating that FIFA could not grant the association’s request to use non-Indonesian players in the match,” Indonesian Football Association (PSSI) secretary-general Nugraha Besoes said.
“If we insist on playing them, we will not be credited points for our world ranking. Even though this is not a tournament, it’s still a FIFA-sanctioned match. So we may opt not to use them in the match against Uruguay and Maldives.”