The question : If I chain Compulsary Evacuation Device to a monarch's effect does the effect dissapear with the Monarch or does it still go through?

(Pretty much asks, if the monarch isn't on the field when the effect is resolves... does it resolve?)

The effect still activates; it comes on when the monarch is tribute summoned, not if it stays out on the field. Also, by CEDing the monarch, you essentially give them a free effect, since they will tribute for it next turn as well.

YES THE MONARCH WILL STILL GET ITS EFFECT BECAUSE Compulsary Evacuation Device DOES NOT NEGATE THE EFFECT LIKE SUCH CARDS AS PULLING THE RUG OR FORCE BACK

U CAN USE FORCE BACK IF THAT THE ISSUE, FORCE BACK WITH NOT LET THE MONARCH HIT THE FIELD SO IT CANT GET ITS EFFECT OFF

to negate the effect, you must negate the summon. so, no