Tergat has told Athletics Kenya he is running elsewhereWorld record holder Paul Tergat is one of three Kenyan marathon stars who will not be available for August's World Championships in Osaka.
London champion Martin Lel and Boston winner Robert Cheruiyot are the others.
"We approached all the top runners but they told us they had contracts to run elsewhere around that time," said David Okeyo of Athletics Kenya.
"We respect their decisions because even our provisional team is composed of very good runners."
Last year's London marathon winner Felix Limo, who was third behind Lel in April, and Rotterdam champion Joshua Chelanga, have also been excluded from the provisional Kenyan team.