UPDATE 1-Omnicom beats revenue estimates spurred by European demand

(Adds organic revenue numbers, background on US clients)

Oct 17 (Reuters) - Omnicom Group Inc's third-quarter revenue topped analysts' estimates, as the advertising group benefited from strong demand in Europe and from the impact of a weaker dollar.

Omnicom said on Tuesday its organic revenue for the quarter ended Sept. 30 rose 7.8 percent in European markets, and 2.1 percent in North America. Analysts on average had expected organic revenue from North America to rise 1.1 percent, according to research firm FactSet.

The strong demand from Europe comes as many U.S. business curb marketing budgets as they wait for more clarity around several of President Donald Trump's proposed policies including an overhaul of corporate taxes.

Omnicom's total revenue dipped 1.9 percent to $3.72 billion in the quarter, hurt in part by competition from consulting firms such as Accenture and IBM.

Analysts on average had expected $3.69 billion, according to Thomson Reuters I/B/E/S.

Net income attributable to the company rose to $263.6 million or $1.13 per share, from $253.8 million or $1.06 per share. Analysts had expected $1.10 per share. (Reporting by Arjun Panchadar in Bengaluru; Editing by Sai Sachin Ravikumar)