Fifa has been dealt a blow after Castrol, Continental Tyres and Johnson & Johnson confirmed they will not be renewing multi-million pound deals with football's governing body.
The companies -- which have been World Cup sponsors since 2010, 2008 and 2011 respectively -- join Sony and Emirates, who have already pulled out of lucrative contracts.
Although the companies' motives have not been revealed, other sponsors, including match ball provider Adidas and Visa, have reportedly become concerned over Fifa's tarnished reputation under president Sepp Blatter after claims of corruption and, in the case of 2022 World Cup host Qatar, workers' conditions.
Campaigners have said the only way Fifa will sit up and listen to calls for reform is if sponsors turn off the taps and stop funding the organisation, reported The Telegraph.
Technology giant Sony and airline Emirates -- two of Fifa's six "top-tier partners" -- decided last year they would end their relationships with the governing body.
Fifa hopes to plug the hole by replacing them with Samsung and Qatar Air respectively.
Top-tier sponsors pay between $24m (£16m, €21m) and $44m (£29m, €39m) a year, while second-tier advertisers such as Budweiser and McDonalds – pay an estimated $10m (£6m, €9m) to $25m (£16m, €22m) a year.