There are currently some debate as to the actual reason for Singer being dropped from the rock epic, but there is common elements to each side of the story.
The official version from the studio is that Singer was routinely late for work and often did not show up at all.
"Twentieth Century Fox Film has temporarily halted production on Bohemian Rhapsody due to the unexpected unavailability of Bryan Singer," read the statement by the studio.
Singer offered his own account to explain his absences.
"With fewer than three weeks to shoot remaining, I asked Fox for some time off so I could return to the U.S. to deal with pressing health matters concerning one of my parents," he said.
"Unfortunately, the studio was unwilling to accommodate me and terminated my services. This was not my decision and it was beyond my control."
The director has also come under heat in recent years with reports of sexual misconduct, however these instances were not mentioned in the fallout of of his dismissal.