The defensive quartet of Rob Fitzgerald, Dean Smith (both hamstring), Alan Massey (ankle) and James Gray (leg) are unlikely to feature in the final at Imber Court (Met Police) in Surrey on Wednesday night (7.45pm kick off).
All four suffered injuries in Monday's 3-2 Ryman Premier League defeat at Tooting & Mitcham United while Marvin McCoy could also struggle to shake off a foot injury he picked up in Saturday's 1-0 defeat to Hastings United.
However, manager Gordon Bartlett is not taking Leatherhead, of Ryman Division One South, lightly as Stones look to win their first league cup since doing the Southern League double in the 1981/82 season.
"Winning it would give our league form a big boost as we go into the last ten games," he said. "I am not going to be able to pick the strongest team because of the injuries we have. I am hoping that over the next 24 hours one or two of the players make miraculous recoveries, otherwise we are going to go there and make some decisions very late in the day.
"It is frustrating as we would have wanted to go into a cup final well prepared, but it has not been the case. We want to win it, so it will not be an experimental side - it will be the best side we can put out that we think is capable of winning the game."
Wealdstone's route to the final: Boreham Wood 3-1; Met Police 2-2, won 3-1 on penalties; Sittingbourne 2-1 in quarter final; Croydon Athletic 1-0 in semi final.
Leatherhead's route to the final: Burgess Hill 1-0; Bognor Regis Town 2-0; Godalming Town 1-0; Fleet Town 3-0 in quarter final; Aveley 1-1, 4-3 on penalties in semi final