Reigning WRC Academy champion Elfyn Evans will drive the car on the Jyvaskyla-based event.
More Fiesta R5s are expected to be seen on later rounds of the WRC with almost 20 orders taken for the British-built cars.
"It's mega to be going to Finland in the car," said Evans, who has already given the R5 its competitive debut on a national rally in Britain.
"I've done Finland twice before and after struggling the first time around, I won the Academy there last year and - because I didn't do Rally GB last year – that one was probably my favourite event.
"It's a dream come true to take a four-wheel drive rally car like the Fiesta R5 to Finland."
Prior to Finland, Thierry Neuville will drive the Fiesta R5 non-competitively on the biggest rally in his Belgian homeland – the European Rally Championship qualifying Ypres Rally at the end of June.
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