Home hopeful Edmund was the only remaining seed in the final four, but he was no match for Fritz, who booked an all-American final against Sam Querrey.
Edmund pushed Fritz all the way in the opener, going deep into a tie-break, but he struggled to recover after squandering five set points and falling behind.
The third seed was immediately broken in the second and went down 7-6 (10-8) 6-3 on a gruelling day.
Meanwhile, Querrey was taken the distance by Thomas Fabbiano but ran out a 6-3 6-7 (4-7) 6-3 winner.
At the Antalya Open, teenager Miomir Kecmanovic reached the final but was still waiting to learn the identity of his opponent due to a weather delay.
Kecmanovic, just 19, upset Jordan Thompson in the first semi-final on centre court.
Lorenzo Sonego led Pablo Carreno Busta 6-3 5-5 in the other last-four match before rain hit and was not able to be completed, meaning the contest will run into Saturday.
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