The heartbroken sister speaks during the search for Victorian man Daniel Carmody, who has been missing in Lara for three weeks

A heartbroken sister whose “terrified” brother has been missing for three weeks has revealed she has been driving through the streets of Geelong at night desperately looking for him.

Daniel Carmody, 53, was last seen on Curletts Road in Lara around 8am on June 26 and is said to have left home with only $20 in cash and no phone or car.

On Wednesday, Daniel’s sister Isobelle Carmody said she last saw her brother last month when she flew from Queensland to take him to a colonoscopy appointment due to fears of medical procedures.

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Carmody said she took Daniel home to her mother’s house after the procedure and then flew back to Queensland. That was the last time she saw him.

“I spent last night driving around in the dark trying to look for him,” Carmody said.

“It’s a strange business looking for someone who is missing. You have a vague feeling that you might find him, but that hasn’t happened yet.

“It’s awful because I landed here (in Victoria) and it’s so cold. I worry about him physically.”

Daniel has an illness and his sister says he lives “in terrified fear of almost everything”.

“I think what triggered this disappearance was that he received a phone call saying a friend had died suddenly and it played into his fears,” she said.

Daniel is known for frequenting Melbourne’s CBD and Geelong areas. He was described as being of Caucasian descent, with a slim build, a bald head and a short gray beard.

He was last seen in a black hoodie, black sweatpants and bright blue sneakers.

Isobelle said her brother “might look rough” but is polite, non-violent and will be scared if approached.

She urged anyone who sees him to contact the police and urged them to call his mother if they decided to speak to him.

“He can hide, but he hides out of fear, not for any other reason,” she said.

“Just approach me kindly and say, ‘You’re Daniel Carmody, maybe you should call your mother.'”