Irene Clennell, 53, was removed from Britain on Sunday after being sent to an immigration detention centre.
"I'm a tiny person and two of the officers were holding my hand, like I'm going to run away or something, like a terrorist," she told The Associated Press in Singapore. "It was quite embarrassing."
Clennell arrived in Britain in 1988, married two years later and has two adult sons and a granddaughter. She and her husband lived in the north of the country.
Her husband of 27 years, John, has serious health problems and Clennell was his sole caregiver, her sister-in-law, Angela Clennell, said in Britain.
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Irene Clennell said he was inconsolable when she was deported.
"He was in tears and stuff," she said. "He is suffering from depression."
The British government's spousal visa system requires that a foreign spouse spend substantial uninterrupted time in the country. Clennell had been granted indefinite permission to remain in Britain in 1992, but this lapsed after she stayed outside the country for more than two years. She returned to Britain as a visitor in 2013, and that year applied to remain in the country as a spouse; her application was turned down without explanation.
Clennell said British officials who accompanied her on the flight promised that she would have help in getting a job and integrating into Singapore society.
"But everything changed when we arrived in Singapore. The officers turned their faces," she said.
"I have no intention of staying in Singapore. I've got nothing here. Everything I've got is there," she said. For now, she is staying with her sister but she said the situation is untenable.
She plans to file an appeal for return to Britain.
"I'm not asking them to reinstate. I'm putting in new applications, but why was it not given? We're still married. I'm still with him. So I don't see why the rule changed.
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