Bellamy fired home a last-gasp free-kick from 25 yards to deny Reading a valuable victory after their substitute Mathieu Manset proddedhome from close range in stoppage time.
Equaliser: Cardiff striker Bellamy (centre) celebrates after his injury-time strike
Ward had told the fourth official to display four extra minutes but Cardiff's skipper levelled in the 97th minute to earn Dave Jones's men apoint.
On target: Jay Bothroyd rounds Reading keeper Adam Federici to score
McDermott said: 'The amount of added-on time was a bit bizarre. I don't know where the referee got all that time. There were a couple of big decisions that went against us.
'Mikele Leigertwood made a clean tackle and it wasn't a free-kick at the end. It's an injustice we have not won the game. I feel sick.'
Jay Bothroyd earlier fired his 17th goal of the season for Cardiff tocancel out on-loan-from-QPR Leigertwood's first league goal of the season.
?Bristol City 0 Swansea 2: Pratley double sinks woeful RobinsDoncaster 1 Burnley 0: Clarets Copp a Cup hangover thanks to king JamesMiddlesbrough 2 Scunthorpe 0: Boyd bags opener as Boro ease relegation fearsWatford 1 Crystal Palace 1: Vaughan helps Eagles edge out of drop zone
?Explore more:People: Jay Bothroyd, Craig Bellamy, Brian McDermott Places: Cardiff
Source: Daily Mail
Source: Daily Mail