Karacan has played for Turkey's youth teams but has yet to make the step up to full international level.
The 23-year-old admitted that being left out of manager Abdullah Avci's latest squad was a blow, but hopes that his performances for Reading will help him force his way into the side.
"When the Turkish people say you're still not quite ready to come back, it's a bit of a kick in the ribs," he told the club's official website.
"It's been a while coming back from injury, about five months, but I want to show them what I can do."
Karacan has made six appearances for Reading already this season.