If they are original swedish crispbread (WASA ?) then they should be ok (1 slice at a time !). Fibre was already deducted. But 1 slice is only 10g (as far as I remember), so it's only 2.9g. If it's original crispbread, then it is basically whole wheat/rye. The grains are broken up, but not pealed or powdered.

If it is the fluffy kind of crisp bread (kind of soft and very bland tasting, not gritty feeling when eating it), the stay well away, as it has been identified as causing cancer (something about the high temperature they make it in)