Australia's Usman Khawaja dug in to put Australia in control against England after the hosts' batting collapse in the second Ashes Test at Lord's on Friday.
Ashes-holders Australia were strongly placed at 130-2 in their second innings, a lead of 221 runs, when rain forced an early close to the third day's play.
Conditions for batting, with the floodlights switched on to counter the gloomy skies in London, were challenging. But Khawaja, whose hundred at Edgbaston last week helped Australia take a 1-0 lead in the five-match series, held firm to reach 58 not out at stumps.
Steve Smith was unbeaten on six following his 110 in Australia's first-innings 416. Khawaja and fellow left-handed opener David Warner, who made an unusually restrained 25 off 76 balls, were content to defend in traditional Test-match fashion against the moving ball.