Too Good At Goodbyes is the first song since his 2015 singles Drowning Shadows and the James Bond theme Writing’s On The Wall.
The 25-year-old singer says it is “about a relationship I was in and it’s basically about getting good at getting dumped”.
“It’s been a long while since I’ve put any music out and I feel that this first single sets the tone of what is to come.”
The track was written with the Oscar and Grammy Award winner’s longstanding collaborator Jimmy Napes and Stargate.
Ahead of its release, Smith sent fans a message.
“First of all I want to say thank-you,” he wrote.
“Thank-you for being so patient and for letting me have the past year to really escape into my mind and write music so freely,” he added.
“I feel so rejuvenated and have so many stories I can’t wait to tell you.
“I have missed you all desperately and a day hasn’t gone by when I haven’t been looking at all your comments and dreaming of singing with you all again.”