
It was the second such shrinkage in a row after the economy shrank 4% in the second quarter, with respect to the same period a year ago.
Gross domestic product is down by 1.4% from January to September compared with 2017.
The hardest hit sectors were business (down 8.9%), fishing (-7.3%) and manufacturing (-6.6). But finance was up by 5.1%.
Argentina has been gripped by an economic crisis this year that forced President Mauricio Macri to agree a US$56 billion (RM234 billion) bailout loan with the International Monetary Fund (IMF).
It came as confidence in the peso crumbled, sending the currency into a freefall that saw it lose half its value against the dollar.
The IMF predicts that Argentina’s economy will shrink by 2.6% this year and another 1.6% in 2019.