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Mads Ostberg rewarded Citroen's faith in the Norwegian to pick up second place while local driver Jari-Matti Latvala completed the podium.
Paddon started the day as the leading factory Hyundai driver in fifth but picked up a spot when the Toyota of Esapekka Lappi crashed on the final day.
He recorded 16 top five stage times and was the best of the non-Scandinavians in the field.
"On the whole, I'm really happy with the weekend," he said. "We have been able to keep pace with some of the event favourites, maintaining a consistent performance.
"Naturally, we would have preferred to score a podium, of course, but we took a measured approach to secure important points for the manufacturers' championship. The final morning was all about taking it easy to bring the car home with a comfortable gap behind us.
"I've really enjoyed the stages this weekend, the car has been a joy to drive and it has given me the confidence I need. We are back on the right track."
Paddon is off-contract at the season's end and another strong result will help his case of trying to earn a drive for 2019.
Teammate and championship leader Thierry Neuville finished ninth and lost a little ground to five-time reigning world champion Sebastien Ogier, who finished fifth.