"I can confirm President Bashir will go ... To Saudi Arabia," Sudan's foreign minister Ibrahim Ghandour told reporters in Geneva. "We look forward (to) normalisation of our relations with the US."
The Saudi-hosted summit of Arab and Muslim leaders is expected to include top level talks on Sunday.
Trump is scheduled to be in Saudi Arabia, home to Islam's holiest sites, from Saturday on his first foreign trip since taking office in January.
Bashir has evaded arrest since his indictment by the International Criminal Court in 2009 for alleged genocide, war crimes and crimes against humanity related to the conflict in Darfur in which at least 300,000 people have been killed.
He denies the charges.
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