Representatives for Carter and Habitat for Humanity said on Thursday that the 92-year-old became dehydrated while volunteering at a home-building project in Winnipeg and was taken to the hospital for rehydration as a precaution.
Former president Jimmy Carter and his wife Rosalynn have volunteered with Habitat for Humanity for more than 30 years.
Winnipeg Regional Health Authority spokesperson Anne Bennett told CNN Thursday Carter was admitted to St. Boniface Hospital.
The Carters arrived in Canada this week to build or fix as many as 100 homes across Canada in four days, ending Friday, the organization said.
JUST IN: Former President Jimmy Carter discharged from the hospital after being treated for dehydration, Carter Center says.
Habitat for Humanity, a charity which constructs homes for the needy, posted a photo of a smiling Carter arriving at the building site.
The Carter Center announced his return to the Lyle Street Habitat build on Twitter.
Before leaving the build site in an escorted ambulance Thursday, Carter passed on a message to the other workers and volunteers, telling them to "stay hydrated and to keep building". They are working with the organization to build 150 homes this week.
A Democrat who served in the White House from January 1977 to January 1981, Carter received the Nobel Peace Prize in 2002 for his humanitarian work. "I wish him a speedy recovery", Clinton wrote.