Despite the new cases he announced that the strict six-day "circuit breaker" lockdown that only came into effect on Thursday would be lifted after authorities found that one positive case had lied to contact tracers.
Mr Marshall said the man was one of the cases linked to the Woodville Pizza Bar, and told authorities he was a customer.
The state, home to about 1.8 million people, has recorded 25 cases from the latest cluster, linked to a returned traveller from the UK.
But what he did not say initially was they he'd worked several shifts at the restaurant and was infected with the coronavirus along with another close contact of his who also worked at the pizza bar, according to the Sydney Morning Herald.It's unclear why the man misled contract tracers, the report said.
"We are absolutely livid with the actions of this individual and we will be looking very carefully at what consequences there [are] going to be", Mr Marshall added.
'His actions have affected businesses, individuals, family groups and is completely and utterly unacceptable'.
"The Emergency Management Act requires people to provide information on request".
Health officials are still trying to contact potentially thousands of others who had contact with the Woodville Pizza Bar in order to isolate people who associated with the worker.
"Had this person been truthful. we would not have gone into six-day lockdown", said Stevens.
South Australia has imposed a strict lockdown as per which nobody is allowed to step out of the house, not even for exercising or walking their pets.
The stay-at-home order will be replaced by new orders which include a density arrangement of one person per four-square-metres, and 10 people at private home gatherings.
Funerals will be allowed 50 people and weddings will return to an allowance of 150, but guests need to stay seated and there will be no dancing.
Gatherings at private residences will be permitted with a cap of 10 people.
Schools will also reopen on Monday.
Masks will be mandatory for personal-care providers such as hairdressers and beauty therapists (and encouraged for clients).
Victoria has recorded no new cases and zero deaths for the 22nd day in a row.
Three new cases of coronavirus were announced in the state on Friday, with all three in quarantine.
Stevens said that the information review team provided by the man for hiring trackers was not satisfied with "the feeling they got from this".
Officials plan a further eight days of restrictions following the lockdown.