A person who visited Horderns Restaurant at Milton Park Country House Hotel and Spa in Bowral has tested positive for COVID-19.
Their movements were confirmed by NSW Health on Sunday.
Anyone who visited the restaurant on Sunday, August 2 between 7.45pm and 9.15pm is considered to be a casual contact.
People should immediately get tested and isolate if symptoms occur, however mild.
NSW Health said the Bowral case was linked to the Tangara School for Girls cluster.
Guest services manager David Fast said the venue had strict COVID-19 procedures in place.
Precautions include a questionnaire on arrival, temperature checks, regular deep cleans as well as the use of antiseptic wipes and gloves.
Staff also wear masks during dinner and bar services.
"This was an isolated incident. No other staff or guests have tested positive," Mr Fast said.
"It was just the restaurant that was the main concern."
Five new cases of COVID-19 were diagnosed in the 24 hours to 8pm last night, bringing the total number of cases in NSW to 3761.
NSW Health has reported the death of a man in his 80s who had COVID-19.
There have now been 54 deaths in NSW from confirmed COVID-19.
There are 3761 confirmed cases including interstate residents in NSW health care facilities. A total of 1,832,980 tests have been carried out.
There were 24,093 tests reported in the 24-hour reporting period, compared with 27,389 in the previous 24 hours.
As COVID-19 continues to circulate in the community, maintaining high rates of testing is vital at this time, and NSW Health urges anyone with even the mildest symptoms to come forward for testing.
To help stop the spread of COVID-19:
- If you are unwell, stay in, get tested and isolate.
- Wash your hands regularly. Take hand sanitiser with you when you go out.
- Keep your distance. Leave 1.5 metres between yourself and others.
- Wear a mask in situations where you cannot physically distance.
All people should get a COVID-19 test immediately should symptoms occur, however mild.
Anyone directed to undertake a 14-day self-isolation period must stay in isolation for the full 14 days, even if they test negative during this time.
Early testing may not detect an infection, and release from self-isolation based on a negative test could allow an infectious person to infect others in the community.
People who are infected and develop symptoms will generally do so within 14 days of exposure.
Visit https://www.nsw.gov.au/covid-19/latest-news-and-updates for a list of locations associated with known cases and advice on testing and isolation.
A full list of COVID-19 testing clinics is available at the following link, or people can visit their GP: https://www.health.nsw.gov.au/Infectious/covid-19/Pages/clinics.aspx.