The runaway leaders must try again this weekend when Boreham Wood visit as FC Halifax Town took their place back in the play-offs.
After a fine turn-around, behind when Will Grigg swooped, the Shaymen soared as Rob Harker’s double made life tricky.
Andrew Oluwabori calmly makes it 3-1 before Aaron Cosgrave made it safe. James Berry’s fine finish couldn’t spark a revival.
A point at home to Boreham Wood in the live TNT Sports game is enough to return the club to League Two.
Bromley want to follow them, and they survived the early loss of goalkeeper Grant Smith to still leave Wealdstone with a 1-0 win.
Michael Cheek scored the goal that edged the club closer to a top three finish.
In the National League South, a long awaited return home for Taunton Town couldn’t spark a big result. They went down 2-1 to Chippenham as Pele Kouisseque’s late goal keeps the Peacocks in trouble.