About 1,500 motorists were screened for alcohol each day during Operation Safe Long Weekend, the latest road safety operation from South Australia Police.
Across the state, 6,090 motorists were alcotested, with 25 returning positive results.
In addition, of the 291 drivers required to undergo a drug screening test, 36 returned a positive result.
A total of 459 drivers were detected speeding, 28 were caught using their mobile phones while driving, and 37 were pulled over because either the driver or passengers were not wearing a seatbelt.
Police conducted the operation from 12:01am Friday 4 October until midnight Monday 7 October.
When the operation last ran in 2018, it resulted in the first fatality-free October Long Weekend since 2008.
South Australia Police were aiming for the same result this year, but despite a high visibility police presence across the state, 3 fatalities were recorded.
Superintendent Bob Gray, the officer in charge of the Traffic Services Branch, said that even with repeated enforcement efforts, fatalities have continued to rise on our roads.
"These are 3 people who have lost their lives on our roads, and these are 3 families who are now impacted by this loss," he said.
"The road toll is not just about numbers, but reflects a terrible human toll for the loved ones, work mates, emergency responders and wider community.
"As a police force, we will continue to work hard to reduce this toll, but we need the help of the community.
"We need all road users to pay attention to the road rules, speed limits and the conditions. We want everyone to get home safe today and every other day."
