2020-04-26 - Blackville, NB - Oval

I was flying my Phantom pro drone around 600 ft up when I saw a black flat half a oval shaped object fly over it but it was about 3000ft high just below the clouds i first thought it was a huge bird but I then noticed it wasn't changing its direction any and was moving perfectly straight as it was on a corse and then realized compared to my drone and the distance farther up it was it looked to be around the size of a small sedan car, it had no moving parts i didn't see any lights just the black bottom of the object it made no sound and it flew off to the northwest I watched it cover roughly about 5-6 miles until it went out of my view. Very strange. Has been very few planes flying lately because of the covid virus lockdown so haven't seen much in the air for past few weeks besides whatever this was.