LONDON — Unilever said Monday that sales in the third quarter are slowing.

The company said it has seen “weakening” in the market growth of many emerging countries in the quarter, and expects underlying sales growth of 3 to 3.5 percent.

“The emerging market slowdown has accelerated as a result of significant currency weakening. Developed markets remain flat to down,” the company said.

Paul Polman, the company’s chief executive officer, said there were no other changes to guidance.

“We continue to grow ahead of our markets, and expect underlying sales growth to improve in quarter four.

“For 2013, we are still on course to deliver against our priorities of profitable volume growth ahead of our markets; steady and sustainable core operating margin improvement; and strong cash flow.”