That would be Det finns inget att oroa sig för in Swedish. There's a difference in meaning here: in the "There is"/"Det finns" versions, reasons to worry do not exist. But in the "It is/Det är" versions, it's a specific thing or situation that does not give cause for concern.
Since you're writing in this forum, I suppose you got it as a dictation exercise? In that case, you need to write what the voice says. If you get this sentence as a translation exercise from English into Swedish, ingenting is an accepted answer, but then you'd be commenting in the reverse sentence forum instead of here.