Outlaws captain Chris Read top-scored with 59 in a surprise defeat to Scottish Saltires in the Clydesdale Bank 40.
The Saltires were 18 runs ahead of the Duckworth-Lewis par score when the weather intervened thanks to an unbroken opening partnership of 108 twenty-three overs into their reply to a Notts total of 219-7.
Michael Lumb (26), Samit Patel (36) and James Taylor (34) all made solid starts but couldn't capitalise before Read and Steven Mullaney raised the rate.
Notts would have felt confident in defending the total if an early breakthrough emerged but resolute knocks from Macleod and Davey, who eased to 73 after 15 overs, gave the hosts solid foundations to stay ahead of D-L.
Returning pace duo Harry Gurney and Andy Carter shipped six an over but Samit Patel and Steven Mullaney produced stern economy which served only to narrow the margin of a deserved victory for the Scots.
Notts will revert their focus to the LV= County Championship before their next CB40 fixture against Hampshire Royals at The Ageas Bowl on Thursday 31 May.