EOS 5D Mark III Producing Corrupted Images

[Cailinnua]

I have a Canon 5D Mark iii camera which keeps producing corrupted images as attached. There is no pattern to these images being produced, I am using the same lens and settings and might take 200 images with 3 corrupt and 30 with 10 corrupt. I have attached a sample of images being produced. Sometimes they have these colour blocks, sometimes less or more of the photo is covered, and sometimes black 

[Tronhard]

Have you downloaded a copy of the manual for this camera?  I strongly recommend that as it is the first port of call for any issues.  You can find it HERE - look on P56.