Dinesh Chandimal's unbeaten half-century and persistent rain in Galle delayed Australia's push for victory in the opening test against Sri Lanka on Friday.
Only a 27-over session was possible on day three with Sri Lanka losing two wickets and slumping to 136-5 before rain stopped play.
Chandimal was batting on 63 with Kusal Mendis on 10 at the other end.
Sri Lanka are still 518 runs behind and will need a Herculean effort to avoid the follow-on even though more rain is forecast for Saturday.
Australia seized control of the contest after declaring their first innings on a mammoth 654-6 and made a couple of inroads when play resumed on Friday.
Kamindu Mendis (15) fell to a wayward delivery from Mitchell Starc, which the batter tickled down the leg side to be caught behind.
Dhananjaya de Silva (22) also threw away his wicket as the Sri Lanka captain came dancing down the track against left-arm spinner Matthew Kuhnemann only to miss the ball.
Australia wicketkeeper Alex Carey had all the time in the world to collect the ball and whip off the bails.
Chandimal hit Nathan Lyon for three fours in an over and has looked comfortable.
Abhishek Sharma's 19-ball fifty went in vain as world champions India were surprisingly beaten by Ireland for the first time in international cricket, slumping to a 34-run defeat in the first Twenty20 in Belfast on Friday.
England roared back into contention on the second day of the third and deciding test against New Zealand with Ben Duckett's rapid century helping his side to 223-2 after three wickets for returning captain Ben Stokes helped to dismiss the visitors for 438 at a sizzling Trent Bridge.
American great Serena Williams will face Australian 20-year-old Maya Joint in the first round of her eagerly awaited return to Wimbledon, a potentially tricky tie for the seven-time champion playing at the tournament for the first time since 2022.
Australia booked their spot in the knockout rounds of the World Cup on Thursday after a cagey draw against Paraguay, who are set to qualify as a third-placed finisher, while Turkey beat USA 3-2, scoring the winner with virtually the last kick of the match.