The Bank Austria Open could be reduced to 54 holes after the opening day was washed out before 11am without a single shot being played.
Almost three inches of rain over the previous two days left parts of Fontana Golf Club under water and meant the first round was postponed until today, weather permitting.
A decision will be taken on Friday afternoon on whether to reduce the event to 54 holes or change to the halfway cut to the top 50 players and ties in an attempt to complete 72 holes by Sunday evening.
"The players need to know before they go out for the second round if the cut is going to be altered and whether we are aiming to go three or four rounds. We will make that decision on Friday afternoon," tournament director Miguel Vidaor said.
"If the weather forecast is perfect we might attempt four rounds but if the weather is dodgy on Sunday we might play it safe and play three rounds."
The afternoon section of Wednesday's pre-tournament pro-am was also a victim of the weather and Vidaor added: "On Tuesday we had 35mm of rain and from 5am this morning we had another 35mm so we are talking almost three inches in two and a half days.
"The course has taken it amazingly well. The green staff can clear the bunkers, the biggest problem we face is the fairways. They are gone, unplayable, and are going to need a few hours to dry out."
A Monday finish is a possibility but would present a number of logistical problems, especially with Euro 2008 about to start in Austria and Switzerland.
The tournament was originally scheduled to finish at 5pm on Sunday to coincide with Austria's opening game against Croatia in nearby Vienna.
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