"uncertainty whether" is correct and usable in written English.
You can use it to express hesitancy, doubt, or hesitation about something. For example, "There was a growing uncertainty whether the project would be completed on time."
There remains uncertainty whether that campaign, apparently orchestrated by the Serbian leadership, amounted to genocide.
Others declined over uncertainty whether workers' compensation would pay for any ill effects.
The O.E.C.D. said there was considerable uncertainty whether the turmoil in the financial markets had fully run its course.
Although the region has an extensive trade in child slaves, there was growing uncertainty whether in this case they existed.
Ms. Marshner said both men had been given the statement to look over, but their assistants voiced uncertainty whether they had seen it.
My next source of delight was the balance of desire and dread in the film, or my uncertainty whether I was having fun or seeing something very frightening.
"There's a lot of uncertainty, whether the presentations will make a difference to the members who haven't made up their mind," Doctoroff said.
The lack of agreement put the April 3 date in doubt, creating uncertainty whether it would be postponed or split into two elections.
There has remained uncertainty whether banks are lending the money from the central bank to customers and thus promoting economic growth.
But there is uncertainty whether this will mark the resumption of substantive talks on Middle East Peace or be little more than a photo opportunity.
There is uncertainty whether Charlie Weis, the offensive coordinator, will opt to follow Belichick, with whom he has become friendly, or stay with Parcells, who has encouraged him in his career.
