Former US President Jimmy Carter will end medical treatment and enter hospice care at his Georgia home, his foundation announced on Saturday, BBC News reported.
The Carter Center said Carter had decided to "spend his remaining time at home with his family," but did not say what had prompted the decision.
Carter, 98, has suffered from recent health issues, including a melanoma that spread to his liver and brain.
Terminally ill patients may seek hospice care instead of going through further medical treatment. The priority is not to provide further treatment, but to provide comfort towards the end of a patient's life.
Carter's grandson, Jason Carter, a former Georgia state senator, tweeted that he visited "both of my grandparents yesterday."
"They are at peace and - as always - their home is full of love. Thank you all for your kind words," he said.
In 2021, Carter and his wife Roslyn celebrated their 75th wedding anniversary. They have four children together.
The country's oldest living leader, he served one term in office from 1977-81.
During his tenure as president Carter faced a spate of foreign policy challenges and the Democrat was defeated in his re-election bid by Ronald Reagan.
Born in Georgia in 1924, Carter entered politics in the 1960s when he was elected as state senator, before becoming the state's governor in 1971.
Five years later he defeated the sitting Republican President Gerald Ford to become the 39th commander-in-chief.