Malik, 22, reportedly sang a whopping 17 songs before he decided he exit the stage. Liam Payne, Harry Styles, Niall Horan and Louis Tomlinson continued on without him, performing the final three songs of the concert.
Needless to say, One Direction fans tweeted their love and support for Malik. "It's not a 1D song without your high note Zayn so get well soon pls," one message read.
"WHEN ZAYN IS SICK EVERYONE IS SICK," read another tweet.
"He’s sick but still has the power to go on stage and sing for his fans Now tell me he doesn't love his fandom," yet another admirer tweeted.
As 1D fans have been pointing out on Twitter, this wouldn't be the first time Zayn fell ill. This past November, he was so sick that he didn't take the stage in Orlando, Fla. One Direction member Liam Payne sweetly said at the time, "We introduced ourselves as Liam, Naill, Harry and Louis, because we aren't One Direction without Zayn."
The Perth show marked the end of the band's Australia leg of their On The Road Again tour. They will head to Japan on Tuesday, but it's not known whether Zayn will be joining them.