Betsy is in his second spell at Adams Park
Wycombe will be without Kevin Betsy for the first three games of the season because of international commitments.
The 33-year-old midfielder has left the country to represent Seychelles in the Indian Ocean Island Games and will return on 15 August.
Betsy will be unavailable for the opening league fixtures against Scunthorpe and Colchester, as well as the League Cup clash with the U's.
Seychelles are hosting the seven-nation competition in the capital Victoria.
Former Fulham man Betsy, who featured 51 times for the Chairboys last season, will follow in the footsteps of his father Lewis, who represented Seychelles at the inaugural 1979 tournament.