"GDP grew steadily in the third quarter, mainly thanks to a strong July", an ONS spokesman said in a statement Monday.
The ONS said the quarterly figure highlights some signs of the economy "slowing", as UK GDP had grown at 1% since the equivalent quarter in 2018.
Suren Thiru, head of economics at the British Chambers of Commerce (BCC), said: "While there was welcome confirmation that the United Kingdom avoided recession in the third quarter, the stronger headline figure masks an alarming loss of momentum through the quarter from a relatively strong July outturn and therefore does little to suggest any meaningful improvement in UK's underlying growth trajectory".
Tej Parikh, chief economist at the business group, said: "The UK economy has been in stop-start mode all year, with growth punctuated by the various Brexit deadlines".
The quarterly growth rate recovered to 0.3 per cent after contracting 0.2 per cent in the three months to June when businesses wrestled with an overhang of raw materials stockpiled before the original Brexit deadline in March.
The central bank last week upgraded its United Kingdom growth forecast to 1.4 percent in 2019 but downgraded 2020 guidance to 1.2 percent. The year-over-year growth of 1% was the slowest since the first quarter of 2010.
Monthly retail sales volumes were flat in September and annual sales growth picked up to 3.1 per cent from a weak 2.6 per cent in August, the Office for National Statistics (ONS) said - slightly less of a recovery than economists had forecast in a Reuters poll.
"Reviewing last year's situation, growth slowed to the lowest level in the past decade".
Monday's data showed business investment held steady in the third quarter versus economists' expectations for a 0.5% fall. Household spending, which has been more resilient than business investment, due to low unemployment and rising wages, rose by 0.4% on the quarter.
An ONS statistician said: "Manufacturing failed to grow as falls in many industries were offset by vehicle production bouncing back following April shutdowns".
The new forecasts, which assume that Britain leaves the European Union with a deal on January 31, contrasted with prior predictions of 1.3 percent for both years.