The ACT remains free of coronavirus cases as almost 70,500 tests have been conducted.
Monday marked the 45th day since a new COVID-19 infection was diagnosed in the territory.
ACT Health confirmed 70,469 tests have been conducted throughout the pandemic, including 335 in the past 24 hours.
Canberrans have again been reminded not to travel to NSW or areas with active COVID-19 cases.
Anyone who has recently travelled to the Sydney region is urged to monitor their health and get tested if they show mild symptoms.
"The advice on affected areas is changing regularly, so keep up to date with the latest advice," ACT Health said in a statement.
"Please be mindful and aware of how easily the virus spreads. We continue to ask Canberrans to reconsider their need for any unnecessary travel, particularly to areas with COVID-19.
"We also encourage Canberrans not to invite friends and family from Greater Sydney to the ACT at this time."
NSW has recorded three new COVID-19 cases, with just one of those acquired locally.
Of the three cases reported in the 24 hours to 8pm on Sunday, two are returned travellers in hotel quarantine and one is a close contact of a previous case.
