Bayern Munich forward Irankunda, one of Australia's most exciting young talents, started the 3-1 win over China and was on the bench when the Socceroos earned a 1-1 draw in Japan last month.
Those results sent Australia into second place in Group C behind the Samurai Blue, a place they will be looking to cement when they take on the third-place Saudis in Melbourne on Thursday and fourth-place Bahrain in Riffa five days later.
Defensive midfielder Keanu Baccus has been axed along with Irankunda, however, right back Grant, winger Boyle, and Degenek are among eight fresh faces in the squad.
Grant won the last of his 21 caps in early 2022 and Boyle, who was cruelly robbed of his chance to play at the 2022 World Cup by a knee injury, returns after a brief absence caused by a wrist injury.
"I honestly didn't see this coming, but I'm absolutely delighted," Grant said in a news release.
"I'm ready to fight tooth and nail, if called upon, to ensure Australia is in a fantastic qualification position following these two games."
Anthony Caceres was one of three players earning a first Socceroos call-up along with youngsters Hayden Matthews and Max Balard, handing the creative midfielder a chance to win his first cap at the age of 32.
The top two from Group C will book a spot at the 2026 finals in North America, while the third and fourth-place teams will move on to another round of qualifying.
"We're in the early stages of this journey as a group and we'll continue to implement the style of play that will be the foundation of our success throughout this cycle," Popovic said.
Squad: Maty Ryan, Joe Gauci, Paul Izzo, Aziz Behich, Jordy Bos, Cameron Burgess, Milos Degenek, Jason Geria, Rhyan Grant, Hayden Matthews, Lewis Miller, Kye Rowles, Harry Souttar, Max Balard, Anthony Caceres, Ajdin Hrustic, Jackson Irvine, Riley McGree, Aiden O'Neill, Patrick Yazbek, Brandon Borrello, Martin Boyle, Mitchell Duke, Craig Goodwin, Nishan Velupillay, Kusini Yengi.
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