The current Gartner Worldwide IT Spending Forecast assumed that the UK would not exit the European Union.
"With the UK's exit, there will likely be an erosion in business confidence and price increases which will impact the UK, western Europe and worldwide IT spending," said John-David Lovelock, research Vice President at Gartner, in a statement.
Data centre systems' spending is projected to reach $174 billion (roughly Rs. 11,71,367 crores) in 2016 - a 2 percent increase from 2015.
Global enterprise software spending is on pace to total $332 billion (roughly Rs. 22,36,675 crores) - a 5.8 percent increase from 2015.
Devices spending is projected to total $627 billion (roughly Rs. 42,24,083 crores) by the end of 2016. Spending in the IT services market is expected to increase 3.7 percent, totaling $898 billion (roughly Rs. 60,53,592 crores).
"Japan is the fastest-growing region for IT services spending with 8.9 percent growth," the report said.
Communications services spending is projected to total $1.38 trillion (roughly Rs. 93,02,847 crores) in 2016 - down 1.4 percent from 2015.
"2016 marked the start of an amazing dichotomy. The pace of change in IT will never again be as slow as it is now, but global IT spending growth is best described as lackluster," Lovelock added.