Surrey were 130/8 in the first innings of their Bob Willis Trophy match with Hampshire at Arundel after just 16.4 overs were possible on the second day.
That means just 40 overs have so far been bowled at the halfway point in the fixture, with only 24.2 achieved on Saturday.
All-rounder Ian Holland, who had taken four wickets on the first day, added Laurie Evans and Gus Atkinson to his total to take his analysis to six for 39.
Sussex loanee Evans had scored his first half-century for Surrey since 2010 but his side remained in trouble on 130 for eight when rain cut the morning session short by 45 minutes.
After 11 morning overs, Holland made the breakthrough when Evans, who needed 64 balls for his adventurous fifty, was lbw for 65.
Evans had added 84 with Jamie Smith, and was quickly followed back to the boundary edge when Tom Scriven found lovely movement away from him to take his outside edge, and the debutant’s maiden first-class wicket.
Atkinson was Holland’s sixth victim when he was leg before – with the covers coming on four balls later.