The 20-year-old, a product of the youth set up at the Banks's Stadium, is hoping to win his first cap in a friendly against the Dutch in the Amsterdam Arena on Saturday, June 2.
"This is a real boost for the lad," Walsall manager Dean Smith told the club's official website.
"He has earned his place in the squad and this is a great opportunity for him.
"It's a proud moment for Will and the club. I received glowing reports about his recent performance for the Under-21s and hopefully he can build on this."