"mounting uncertainty" is a correct and commonly used phrase in written English.
It can be used to describe a situation or feeling where uncertainty is increasing or growing over time. Example: As the days went by without any updates on the missing hiker's whereabouts, mounting uncertainty filled the hearts of their loved ones and rescue teams.
Media coverage of failing firms and layoffs contributed to mounting uncertainty and fear.
Rushdie's decision to withdraw comes after two weeks of mounting uncertainty.
Explaining the decision, Jordan said: "Rapidly mounting uncertainty on the financial markets has substantially increased demand for safe investments.
Faced with mounting uncertainty over the immediate future of the Russian economy, investors have been piling out of the rouble.
Yet there is also mounting uncertainty in the local development sector about which way things are going to go.
Liu's status had already been a source of mounting uncertainty: he injured a hamstring in May and had not raced in more than two months.
Howard Archer, chief European and UK economist at IHS Markit, said: "The car sector will obviously be hoping that business confidence and activity prove resilient in 2017 despite likely mounting uncertainties over Brexit.
Beyond weather-induced revisions, the latest FAO revisions take into consideration the mounting uncertainties regarding trade policies, as well as the changes in exchange rates and rising energy prices.
The debate will probably be affected by the mounting political uncertainty in Afghanistan.
The marines completed their pullout from Baghdad amid mounting political uncertainty, leaving the city under the control of an Army force that was maintaining a much lower profile.
The EU's finance commissioner, Pierre Moscovici, flies into Athens on Monday amid mounting political uncertainty following the Greek government's abrupt decision to bring forward the presidential elections.
