"Our goal has so far proved to be too aggressive," Goeran Grosskopf, chairman of the Ingka Holding parent company that comprises all of the Ikea businesses, told Swedish financial daily Dagens Industri.
"Sales haven't developed as fast as we thought."
Ikea posted sales of 27.9 billion euros (USD 36.5 billion) in the fiscal year to the end of August, only 3.1 per cent more than a year earlier.
In the 2011-2012 period, growth reached 9.8 per cent, the highest for six years.
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"The main reason is that the world economy hasn't evolved as strongly as we expected," Grosskopf said.
"Especially the development in southern Europe is very far from what we thought."
Last year, Ikea founder Ingvar Kamprad, known for his reluctance to talk to the media, criticised the company's project to open 25 stores per year as being too ambitious.
Kamprad, aged 87 and suffering from health problems, is still listened to in Ikea, even though he has left his various functions within the company.
Last June, he announced he intended to leave Switzerland to re-settle in Sweden by the end of 2013 or the beginning of 2014, still a pending plan in early January.
"Those are hypothetical speculations," he told Dagens Industri.
"And his plan is still to move back home in 2014."
Founded in 1943, Ikea owns 303 stores in 26 countries and employs 139,000 people.