The singer is out from the scheduled concerts in Vienna, Strasbourg and Cardiff after falling ill earlier this week.
Hospitalized with pneumonia, George Michael has to cancel a number of shows in Europe this week. His publicist Connie Filippello confirmed that the singer was "diagnosed with pneumonia and he is currently receiving treatment."
Filippello did not elaborate on when or where George had contracted the illness but said that he is "on the mend". According to some reports, the 48-year-old is treated at Vienna's AKH hospital. He canceled his planned concert in the Austrian capital just two hours before it was due to start.
Other shows which he misses due to the health issue are those held in Strasbourg, France and Cardiff, Wales. Last month, he also skipped a concert in London but it has been rescheduled to May 2, 2012. He stated "back in spasm and a splitting headache" as the reasons of canceling.