* Euro falls vs dollar as uncertainty over Greece continues
* Analysts say EU aid package looking unlikely
* Euro falls to record low vs Swiss franc
(Adds comments, details. Updates prices.)
By Vivianne Rodrigues
NEW YORK, March 23 (Reuters) - The euro fell against the dollar on Tuesday over concerns euro zone policy makers are unlikely to provide a rescue package for Greece at a summit later this week.
Worries over Greece's ability to win financial aid to help repay debt is keeping the euro close to a three-week low. That supported some safe-haven flows into the U.S. dollar.
Disenchantment with the European single currency was compounded by its decline to an all-time low versus the Swiss franc.
Traders said pressure on the euro will continue ahead of a summit of European Union leaders on Thursday and Friday.
The region's leaders are at odds on how and whether to provide help to the indebted nation. Chancellor Angela Merkel, facing fierce opposition in Germany to any bailout, said there would be no decision on Greek aid at the EU summit, party sources said on Tuesday. For details see, [
]Failure to reach a quick resolution over Greece, combined with lackluster euro zone growth, could prevent the European Central Bank from raising interest rates until well into next year and add to selling pressure.
"The risk is for further weakness in the euro if nothing concrete comes out of this summit in terms of financial help to Greece," said Joe Manimbo, a currency trader at Travelex Global Business Payments, in Washington D.C.
In mid-morning trading in New York, the euro was down 0.1 percent against the dollar <EUR=> at $1.3544, after trading as low as $1.3477 earlier. The single currency hit a three-week low around $1.3461 on Monday.
A report in the U.S. showing sales of previously owned homes fell less than expected in February gave a boost to risk sentiment and took some of the selling pressure off the euro. [
].Some analysts said the euro's 5 percent drop against the dollar since the start of the year may be overdone.
The housing data "gives a bit of a boost to the euro based on improved risk sentiment," said Brian Dolan, chief currency strategist, at Forex.com, in Bedminster, New Jersey.
The euro fell as low as 1.4287 <EURCHF=> against the Swiss franc, breaking the previous low, according to Reuters data. It was last at 1.4301, down 0.3 percent on the day.
The Swiss National Bank has been intervening in forex markets over the past year as part of its efforts to protect the Swiss economy and traders were watching just how much the central bank will allow the currency to climb.
A spokesman for the Swiss National Bank declined to comment on the move.
"If you look at the evolution of the SNB's language it suggests they're not so worried about it (Swiss franc appreciation) any more," said Geoffrey Yu, currency strategist at UBS AG.
NO RESPITE FOR EURO
Greek Finance Minister George Papaconstantinou said on Tuesday Greece wants a European solution to its debt crisis and expects positive results from the EU summit. [
]But European Central Bank vice-president nominee Vitor Constancio added fuel to the fire, saying IMF loans would not be enough to satisfy Greek needs [
]."It is looking increasingly unlikely that there will be an EU aid package for Greece which leaves the euro in a negative position," said Ian Stannard, Senior Currency Strategist at BNP Paribas.
"I expect a test of this year's low at $1.3435, and if that breaks, a quick move toward $1.3100," he added.
(Additional reporting by Nick Olivari, Steven Johnson in New York and Neal Armstrong in London; Editing by Andrew Hay)