* Q3 loss $0.25 a share vs EPS $0.23 year ago
* Revenue $135.7 million
* Analysts forecast loss $0.11/shr, revenue $136.04 mln
* R&D, sales and marketing costs jump (In U.S. dollars unless noted)
TORONTO, Oct 28 (Reuters) - Mobile modem maker Sierra Wireless (SWIR.O) (SW.TO) reported a quarterly loss on Wednesday as the cost of sales and research and development mounted and revenue inched lower.
Still, the company said its adjusted earnings beat the outlook that it provided in late July and revenue was in line with that forecast.
Sierra, which makes the AirCard line of wireless modems, said it lost $7.6 million, or 25 cents a share, in its third quarter. That was down from a profit of $7.3 million, or 23 cents a share, a year earlier.
Revenue was $135.7 million, down slightly from $136.8 million a year earlier.
The company said sales and marketing expenses rose to $14.2 million from $8.7 million a year ago. R&D costs jumped to $22.7 million from $13.1 million. It also booked $5.3 million in restructuring expenses.
However, its adjusted earnings were 19 cents a share, compared with 28 cents a share a year ago. This topped its July outlook for 6 cents a share, it said.
Analysts, on average, had expected the company to lose 11 cents a share on revenue of $136.04 million, according to Thomson Reuters I/B/E/S.
For the current, fourth quarter, it forecast revenue of $143 million and adjusted earnings of 17 cents a share.
Sierra reported its results after markets closed. During the day, its shares closed 7 Canadian cents higher at C$10.00 on the Toronto Stock Exchange.
$1=$1.08 Canadian Reporting by Wojtek Dabrowski; editing by Rob Wilson