Öztürk made his international debut for the Turkey under-18 team in November 2010, in the starting eleven for a friendly match against their German counterparts, and came off the substitutes' bench against the same opponents two days later.
In January 2011, he was selected for his native Belgium's under-18 team, and was in the starting eleven for two friendlies against France U18.
He played twice more a few weeks later in friendlies against Estonia U18, and twice more in the 2011 Slovakia Cup.

In August 2011, Öztürk moved up to the Belgium under-19 team, becoming a regular selection both in friendly matches and in qualification for the 2012 UEFA under-19 championships.
He scored his first international goal in a 4–1 friendly defeat of Turkey on 7 September.

In February 2013, Öztürk was called up to the Turkish under-21 squad for the upcoming match against Norway, but played no part.
He did appear for Turkey's under-20 side in two friendly matches against their Portuguese counterparts in March 2013 – in the first of the two, he scored the second goal in a 2–1 win.
Selected for Turkey's squad for the 2013 FIFA U-20 World Cup, he started all three of Turkey's group matches and their second-round defeat to eventual winners France.
Öztürk made his under-21 debut for Turkey in their opening qualification match for the 2015 European championships, a 4–0 home win against Malta.
Öztürk made his international debut for the Turkey under-18 team in November 2010, in the starting eleven for a friendly match against their German counterparts, and came off the substitutes' bench against the same opponents two days later. In January 2011, he was selected for his native Belgium's under-18 team, and was in the starting eleven for two friendlies against France U18. He played twice more a few weeks later in friendlies against Estonia U18, and twice more in the 2011 Slovakia Cup.
In August 2011, Öztürk moved up to the Belgium under-19 team, becoming a regular selection both in friendly matches and in qualification for the 2012 UEFA under-19 championships. He scored his first international goal in a 4–1 friendly defeat of Turkey on 7 September.
In February 2013, Öztürk was called up to the Turkish under-21 squad for the upcoming match against Norway, but played no part. He did appear for Turkey's under-20 side in two friendly matches against their Portuguese counterparts in March 2013 – in the first of the two, he scored the second goal in a 2–1 win. Selected for Turkey's squad for the 2013 FIFA U-20 World Cup, he started all three of Turkey's group matches and their second-round defeat to eventual winners France. Öztürk made his under-21 debut for Turkey in their opening qualification match for the 2015 European championships, a 4–0 home win against Malta.
Alpaslan Öztürk