While he hasn't retired, there was a period where he took a break from touring in 2019 to focus on writing and other projects. He explained this in a blog post, stating that he needed a break from the constant travel and the demands of touring.
He's since returned to the stage and is actively working on new music.
Perhaps you are thinking of another artist? If you have a specific musician in mind, please provide their name and I'll be happy to help you find information about their career.