Ms Ristevski, 47, was last seen at her home in Oakley Drive, Avondale Heights, about 10am on June 29.

She had reportedly been arguing about financial issues with her husband, Borce, with whom she owns Taylors Lakes formal wear business Bella Bleu. It has been reported she went for a walk to "clear her head" after the argument.

Detectives from the missing persons squad have confirmed they questioned Mr Ristevski about his wife's disappearance last Friday. He has since been released pending further inquiries.

"A 52-year-old Avondale Heights man was interviewed on Friday," a police spokeswoman said. "The investigation remains ongoing."

Police have also searched Ms Ristevski's house and the surrounding area.

Her mobile phone is switched off and she has not used her debit card.

Ms Ristevski's daughter Sarah, 21, made an emotional plea for help to find her mother last week.

Sarah told radio station 3AW she had reached out to her mother's friends on Facebook but to no avail.

"There's no leads at all, no sightings, nothing," she said. "I've logged onto her Facebook and contacted all of her friends. No one has seen her."

Sarah said she was desperate for her mother to return home.

At the time Ms Ristevski went missing, she was wearing a black jacket and dark pants. She has shoulder-length dark hair, is about 160 centimetres tall and has a slim build.

Anyone with information is asked to contact Crime Stoppers on 1800 333 000.