Shim Jaehyun, former member of the K-pop boy group F.ABLE, has passed away at the age of 23. The news of his passing was first shared on June 29 by acquaintances and later confirmed by fans and former colleagues online. Jaehyun had been privately battling leukemia in recent years. His illness was not publicly known, and many fans only learned of it after his death. Details regarding his diagnosis and treatment remain undisclosed, out of respect for his and his family’s privacy.

Born on April 7, 2002, Jaehyun debuted with F.ABLE in June 2020 under Haeirum Entertainment. As the youngest member, he served as the group’s vocalist and maknae, endearing himself to fans with his gentle demeanor and bright energy during promotions. Though F.ABLE remained relatively under the radar in the K-pop scene, those who followed the group often spoke of their close-knit bond and sincere dedication to their craft.

The group released several digital singles, including “Burn It Up” and “Run Run Run,” before going inactive around mid-2023. Three of the five members later re-debuted under a new project called ENPHAZE, suggesting that F.ABLE had disbanded without an official announcement. Jaehyun did not take part in the new activities, and little was known about his life post-F.ABLE.

Following the announcement of his passing, former member Hojun posted a heartfelt tribute on social media, expressing regret over their lost contact and thanking Jaehyun for the time they spent together.

Fans also shared their grief online, mourning not only the loss of a young life but the quiet way in which Jaehyun seemed to have faced his final years. As of now, no funeral details or memorial services have been made public. However, messages of condolence continue to circulate across fan communities, many of whom have revisited Jaehyun’s performances to honor his memory.