The Australian superstar wants to play at the 2014 World Cup in Brazil but fears his international career is coming to a close under the German coach
The 33-year-old forward is aiming to be part of Australia's 2014 World Cup campaign but revealed to the Herald Sun he's worried his national team place isn't secure under Osieck.
"Holger's got his own ideas," Kewell said. "I'll always be there for the Socceroos.
"I enjoy playing for Australia and hopefully it can continue but if he wants to go another way, so be it. I wasn't getting great vibes (in the most recent camp) and I'm not a young cat.
"I'm an old cat and I've been around the block a few times. Maybe I'm over-exaggerating."
The former Leeds United, Liverpool and Galatasaray man added: "I believe I can get to 2014. Whether or not I'm playing for Australia or not is up to the manager, but first you've got to be playing well for your club."
Melbourne Victory, who signed Kewell to a three-year deal last August, have admitted they are open to letting him go out on loan during the long A-League off-season.
However, Kewell added: "I'll wait and see, but I probably won't go out on loan. I'd rather have a rest. But I'd love to stay in Melbourne. It's a great city, the fans are fantastic and my family enjoy it."