The ten, who were charged with belonging to a terrorist organisation, were remanded in custody, the Dogan news agency said.
Six others who also appeared before the court in Istanbul were set to be released, Dogan added.
Authorities have said the attack was the work of a Syrian bomber from Isis.
Ten German tourists were killed and another 17 people wounded in the bombing in the historic centre of Istanbul near the Blue Mosque and the Hagia Sophia, the towering former Byzantine church that is now a museum.
The remains of the German victims arrived at Berlin's Tegel airport onboard a German army transport plane on Saturday.
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The suspects, whose nationalities were not disclosed, were also said to have links to the Isis group.
Ankara has often been criticized by its Western allies for not doing enough to combat Isis jihadists who have seized swathes of territory in neighbouring Syria as well as Iraq.