The 31-year-old actor, who played singing quarterback Finn Hudson in the hit show, died from an alcohol and drug overdose in a Vancouver, Canada hotel room on July 13, 2013, and three years on, friends and fans of the hit TV musical series took a moment to mourn his passing, reported Entertainment Tonight.
The hashtag "#3YearsWithoutCory" began trending on Twitter as fans marked the death anniversary, and a number of his former castmates also took to social media to share their continued grief.
The actress, who split from her latest boyfriend, Robert Buckley, earlier this month, recently had a permanent reminder of Cory tattooed on her torso - the number '5', a nod to his character's jersey number.
"The minutes become days, and the days become years... but you always remain so close. I miss you, Brother," Morrison wrote.
Meanwhile, Naya Rivera wrote: "Always missed and never forgotten", and Jenna Ushkowitz added: "The time may pass but the warmth of your generous soul and the humility in your goofball nature will never fade. You are and always will be our quarterback. We miss you, friend".
Actress Heather Morris said, "Not only was Cory the most genuine, always the guy to stop and say hi to fans, but he made everyone around him laugh... He was our family. We miss you bud. #3yearswithoutcory".