The 26-year-old, who scored the club's first-ever competitive goal at the Jakemans Community Stadium, has made 30 appearances in amber and black since arriving from Stockport County in 2020.
Dimaio will not be permitted to feature for Curzon in their fixture against the Pilgrims on April 9 – and United have a recall option after the first 28 days of the loan spell have elapsed.