In the note — signed by remaining members Ally Brooke, Normani Kordei, Dinah Jane and Lauren Jauregui — the girls wish Cabello well after revealing they were notified she would be moving on "via her representatives."
The remaining girls reassure their fans — called Harmonizers — that they will be continuing as a foursome while also working on their respective solo endeavors.
Cabello flirted with going solo last year when she was featured on Shawn Mendes' hit song, "I Know What You Did Last Summer." The song hit No. 20 on the Billboard Hot 100 chart. Cabello is also featured on the Machine Gun Kelly song "Bad Things," which just reached No. 10.
The band had announced at the iHeartRadio Jingle Ball concert earlier this month that they had started work on their third album. That news helped settle talk of a breakup, which the girls addressed earlier this year in an interview with Entertainment Tonight. "Fifth Harmony is definitely our first love ... it's always been the foundation of everything," Dinah Jane said.
Fifth Harmony scored its first major hit this year with "Work From Home." The song went to No. 1 on Billboard's Rhythmic Songs chart, marking the first time a girl group had reached the top spot in 15 years since Destiny Child's "Survivor" back in 2001.