The trio from Sydney, who were mentored by Ronan Keating during their time in the competition, were eliminated by the public during last night's episode after performing Adele's 'Turning Tables' for the live audience.
Keating said: "I'm devastated to see these guys go home... there's nobody like them." He said that he will still be trying to get their winner's single on the radio.
Sophia from Three Wishez said: "We're so lucky to be in the Top Four and I'm so proud of us to get this far," while Joseph added: "This isn't the end for us, it's just the beginning."
The final three contestants for The X Factor 2011 are therefore Natalie Bassingthwaighte's act Andrew Wishart, plus Johnny Ruffo and bookies favourite Reece Mastin, who are both mentored by Guy Sebastian. Mel B no longer has an act left in the running.
Last night's episode of The X Factor featured special performances by Florence + the Machine, Ed Sheeran and Stevie Nicks. Kylie Minogue has been confirmed as the main performer at next week's grand final.
> Reece Mastin 'doesn't want to be Aussie 'X Factor' favourite
> Susan Boyle: 'Aussie 'X Factor' was surreal experience'
Watch Three Wishez perform on last night's The X Factor below: