Public concern and uncertainty swept across the country following Thursday's announcement by the government.
The man was among 26 sailors who arrived in Apia on Friday last week on a repatriation flight from Auckland with more than 250 others.
The government said he was stationed in Europe, adding all the sailors were tested for coronavirus upon arrival at Faleolo Airport.
An initial test at the airport returned a negative result for the coronavirus.
But the second test on Wednesday came back positive, making him Samoa's first suspected case for the virus.
However, a third test Thursday returned a negative result.
PM calls for calm
Addressing the nation, Prime Minister Tuila'epa Sa'ilele Malielegaoi called for calm and urged people to keep faith and wear masks.
He also urged the public to continue to follow the advice of authorities and government officials.
He said Samoa had been preparing to deal with incidents of this nature.
Many Samoans were heeding their leaders' call, with people seen with masks around Apia.
But they were also nervous.
RNZ Pacific Correspondent, Autagavaia Tipi Autagavaia, said while there had been calls for calm, people were not taking any chances.
"There is panic amongst the general public following the announcement by the prime minister," he said.
"Few schools around Apia have closed and children have been take home by their families."
Parents take children out of school
Banking executive Ina Parkinson is one of those parents who chose to pick up their children from school.
This is despite no official word from the government that schools should close.
Parkinson said it was better to be safe than sorry.
"We have been waiting for something like this.," the mother-of-six said.
"The Covid-19 is already in the Pacific and was bound to come to Samoa soon.
"My family has been preparing for this: we have done our shopping for food and other supplies.
"I was outside the office and saw people panic-buying at the shops and even people queuing up for fuel at the gas stations."
St Joseph's College teacher Sustina said they were having end-of-year exams this week.
She said unless there was a directive from the Education Ministry to close the school, St Joseph's would remain open.
Photo RNZ Pacific Caption: Prime Minister Tuilaepa Sailele Malielegaoi