The 3rd sprint took place from 16/10/2017 to 10/11/2017 (4 weeks), including the week of 1st November when many people were on leave.
The sprint review took place on Monday 13th November and it overrun from the planned 1 hour length.
As we can see,
The burn down charts
First looking only at completed vs planned and then including unplanned items:
The sprint retrospective main points were: