It is not entirely clear what led to the group's departure from Buckingham, though his suit describes the debate about touring schedules.
Fleetwood Mac was originally founded in 1967 by Peter Green and is named after two members of his band, Fleetwood and John McVie. Green left the band in 1969. Buckingham joined in 1974, the same year as Nicks, the lead singer of Fleetwood Mac.
Buckingham wrote some of the band's best-known songs, including "Go Your Own Way," which was the first single from the 1977 band's hit album, "Rumors."
Fleetwood Mac has had a tumultuous history. The group took a break in 1982 and when they agreed to return to the tour in 1987, Buckingham retired at the last moment. In 1998, Christine McVie left the band and then rejoined in 2014.
"Everything that we have in the manga, the discord and the nature of the band, were the people who separated, the dysfunction," Buckingham told CNN at a MusiCares event, days before he discovered that the band would be on tour without him. "Right under all that dysfunction there is a great love."
CNN has approached the representatives of Buckingham and Fleetwood Mac for comments.