Uber Technologies said that growth in bookings for its lift-hailing and delivery services rose 6% in the latest quarter.
This marked the third quarter in a row that growth has remained in the single digits after double-digit growth for all of last year.
The San Francisco-based firm lost $1.07 billion for the three months ending September 30, a 20% increase from the previous quarter.
The loss was 27% lower from a year ago, when the company posted its biggest publicly reported quarterly loss on the heels of the departure of Uber co-founder and former chief executive Travis Kalanick.
Uber is seeking to expand in freight hauling, food delivery and electric bikes and scooters as growth in its now decade-old lift-hailing business dwindles.
The company, valued at $76 billion, faces pressure to show it can still grow enough to become profitable and satisfy investors in an initial public offering planned for some time next year.
Its adjusted loss before interest, taxes, depreciation and amortszation was $592m, down from $614m in the previous quarter and $1.02 billion a year ago.
"We had another strong quarter for a business of our size and global scope," said Nelson Chai, Uber's chief financial officer, who joined in September after the job had been vacant for three years.
He emphasised the "high-potential markets in India and the Middle East where we continue to solidify our leadership position."
But broader economic conditions and sustained losses could push Uber to merge with rivals in India and the Middle East, particularly as Uber and India-based Ola share an investor in SoftBank Group.
Uber's gross bookings were $12.7 billion, up 6% from the previous quarter and up 41% from a year ago.
In late 2016, Uber's quarterly bookings growth approached 30%, and in early 2017 it still sustained double-digit growth quarter-over-quarter. At the start of this year, however, bookings growth slid into the single digits.
Revenue for the quarter was $2.95 billion, a 5% boost from the previous quarter and up 38% from a year ago. That trailed the second-quarter year-over-year revenue increase of 63%.
As a private company, Uber is not required to publicly disclose financials, but last year started releasing selected figures.
Since CEO Dara Khosrowshahi took the helm more than a year ago, Uber has retreated from foreign markets where it had suffered heavy losses and shuttered certain pricey ventures including self-driving trucks.
But Khosrowshahi has plowed the savings back into its freight-hauling, food-delivery, and electric scooter and bikes businesses.
An investment by SoftBank that closed in January, which gave the Japanese investor a 15% stake in Uber, included a provision that requires Uber to file for an IPO by September 30 of next year, or the company risks allowing restrictions on shareholder stock transfers to expire.
That could create a mess for Uber's ownership structure and equity value, and pose regulatory problems.
Uber is considering moving its public debut up from the second half of 2019 to the first half, given concerns about a market downturn and an expected IPO from its chief US rival, Lyft, according to sources familiar with the matter.
Khosrowshahi has focused on growing Uber Eats, which took in $2.1 billion in booking revenue, marking a 150% jump over last year and about 17% of total bookings.
Uber has also pledged to double its investment over the next year in Freight, a brokerage service set up in May 2017 for truck drivers and fleet managers looking for cargo to haul.
The business is doubling the number of loads it connects with truckers every quarter, Uber said.
But it is not yet clear whether either business can sustain a profit. It is also unclear how Uber will fare in a shakeout of the crowded global food-delivery industry, and whether its freight business will be widely adopted by fleet managers.