UPDATE 3-InterContinental warns trading still challenging

* Q3 adjusted operating profit down 19 pct to $124 mln

* Signs of occupancy stabilising

* Room rates under "considerable pressure"

* Revenue per available room down 15.2 percent

* Shares down 0.9 percent

(Recasts, adds analyst comment; updates shares)

By Matt Scuffham

LONDON, Nov 10 (Reuters) - InterContinental Hotels (IHG.L), the world's biggest hotelier, said it was too early to forecast a recovery as trading conditions remained challenging after posting a 19 percent fall in third-quarter operating profit.

The group, whose brands include InterContinental, Crowne Plaza and Holiday Inn, said on Tuesday that adjusted operating profit fell to $124 million from $153 million a year ago.