The bad weather had also affected play in Friday's second round with a handful of golfers forced to complete that round on Saturday morning.
Spaniard Gonzalo Fernandez-Castano was part of the group who teed off early on Saturday at the Sentosa Golf Club and he shot a spectacular 10-under-par 61 to open up a three-shot lead upon the completion of the rain affected second round.
Castano had put himself in a strong position to take the US$6million championship at 15-under-par with Saturday afternoon's third round play about to begin.
And then the rain came.
Only a group of about 25 golfers were able to complete a couple of holes of play in the third round before a heavy downpour hit Singapore causing more headaches for organisers of the event which has been co-sanctioned by the European and Asian Tours.
Officials announced at 1150 (local time) that Round 3 had been suspended due to the thunderstorm.
As the rain continued to fall past 1620 (local time), it was announced that play would be suspended until Sunday and the tournament scrapped to 54 holes.
The players are scheduled to come back onto the course at 0730 on Sunday to begin what organisers are hoping will be the final round of the Barclays Singapore Open 2011.
Further disruptions to the tournament could see it stretch into Monday.
Earlier, Italian Edoardo Molinari signed off with a 68 on Saturday morning to join James Morrison of England in joint-second spot at 12-under-par.