The singer and former star of The Partridge Family was recently diagnosed with the memory loss syndrome, ET can confirm.
Cassidy recently spoke about his history with dementia -- including watching both his grandfather and his mother, actress Evelyn Ward, suffer from the illness -- and admitted to People
that he had long feared that he would also receive the diagnosis.
"I was in denial," the 66-year-old "I Think I Love You" singer shared, "but a part of me always knew this was coming."
Cassidy also reflected on watching his mother "disappear" into her struggle with the disease, recounting, "In the end, the only way I knew she recognized me is with one single tear that would drop from her eye every time I walked into the room."
"I feared I would end up that way," he added.
Ward died in December 2012 from Alzheimer's-related dementia at the age of 89.
In the wake of his dementia diagnosis, Cassidy revealed that he's decided to focus on his health and therefore will no longer be touring as a musician.
"I want to focus on what I am, who I am and how I’ve been without any distractions," he explained. "I want to love. I want to enjoy life."
Cassidy's reps told ET that Cassidy will still perform his upcoming tour dates at the Greenwich Odeum in Greenwich, Rhode Island, on March 3, and B.B. King's Blues Club in New York City on March 4.
"I could've fallen off the front of the stage because I couldn't see," said Cassidy, who's had five eye surgeries over the last few decades and told the audience member that he was "highly sensitive" to bright lights. "I got to a point where I was really angry." Check out the video below to hear more about the incident.