Gunnar Lennart Hultqvist was one of the estimated 8,000 Swedes who fought during the war, and he was killed in battle in 1944 on the Karelian Isthmus, which used to be part of Finland. He was 24 years old at the time.
His body was found by a Russian team last year and he was identified thanks to his ID necklace, according to Swedish Radio in Jönköping.
His sister, Britta Stenberg-Tyrefors, aged 85, will attend the funeral. She found out about the discovery of her brother's remains after reading an article in a newspaper last year.