Andrew Craig Brunson, a 50-year-old evangelical pastor from Black Mountain, North Carolina, will continue to be remanded at his house, Andalou news agency said.
The case has strained ties between Nato allies Turkey and the United States. American president Donald Trump has repeatedly demanded his release.
Brunson was arrested in December 2016.
He faces up to 15 years in prison for "committing crimes on behalf of terror groups" in reference to outlawed Kurdish militants and the network of a US-based Muslim cleric blamed for a failed coup attempt, and an additional 20 years for espionage.
The pastor strongly denies the charges.
Stay up to date with the latest news stories from a Christian perspective. Sign up to our daily newsletter and receive more stories like this straight to your inbox every morning.
