The 50-year-old "Friends" alum was casually dressed in jeans, a dark jacket and a baseball cap when he was spotted in New York City with a bare left hand, reported Us weekly.
Schwimmer and his wife of six years, who share daughter Cleo, five, are "taking some time apart."
"It is with great love, respect and friendship that we have decided to take some time apart while we determine the future of our relationship," the pair had said.
"Our priority is, of course, our daughter's happiness and well being during this challenging time, and so we ask for your support and respect for our privacy as we continue to raise her together and navigate this new chapter for our family."