Visa Europe said it wanted to determine whether the nature of Wikileaks' business "contravenes Visa operating rules".
Service fee revenues also include revenues earned from Visa Europe in connection with the Visa Europe Framework Agreement.
This was followed by Visa Europe on Wednesday, which said it would be carrying out an investigation into the whistle-blowing website.
Datacell added that the suspension would last for an initial seven days, but this has yet to be confirmed by Visa Europe.
Visa Europe is insisting that all issuing banks and e-tailers introduce the appropriate software by October next year, with fines for non- compliance.
Spending was down by 1.7% on a year earlier, and by 0.9% on the previous month, with the High Street particularly weak, Visa Europe's expenditure index found.
Datacell, which operates from Switzerland and Iceland, said it would move immediately to try to force Visa Europe and Mastercard to resume allowing payments to the whistle-blowing website.
Visa earns data processing revenues from the authorization, clearing, settlement, transaction processing services and other maintenance and support services that facilitate transaction and information processing among customers globally and Visa Europe.
London, 2 October 2012 - Working with Visa Europe, RBS and NatWest today launched TouchPay, a mobile contactless payments service for Apple iPhone 4 and 4S models powered by an NFC-enabled (Near Field communications) protective cover accessory.
ENGADGET: Visa lets iPhone-toting NatWest and RBS customers pay with NFC cases, join the future
There are roughly 70 million smart cards with electronic purse applications being used throughout Europe now, said Jon Prideaux, executive vice president for new products at Visa International in Europe.
In the next few weeks Bosnians and Albanians are expected to be granted visa-free travel to Europe's Schengen area.
ECONOMIST: Hillary Clinton flies in to bump a few heads together
Higher unemployment may trigger hostility to immigrant labour, making it harder for Europe to reform its ungenerous visa and work-permit rules so as to attract foreign talent.
The now-celebrated Sri Lankan priest was denied a visa to enter Italy during his visit to Europe in October to promote his controversial book Mary and Human Liberation.
Visa saw the strongest growth coming from their Central Europe, Middle East, and Africa, which surged 12%.
FORBES: Visa Nearly Doubles Profit As Volume Grows, Shares Rise On $1.5B Buyback Announcement
That is the bitter experience of loyal Atlanticists in eastern Europe, who have been waiting for America's visa regime to lift ever since the iron curtain fell.
ECONOMIST: A docile ally wins visa-free travel to America. Others fume
To them, convergence with Europe is not about values but interests, which include a visa-free regime and access to property, bank accounts, yachts for the elite and protection from Russia.
ECONOMIST: A country caught precariously between east and west
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