Any job canceled by you or the client will go into your Canceled folder. You can view the job details and saved content there, but you can no longer submit the content to the client. The client has a record of the cancellation, but they no longer have access to any content that was written for that job.
For the purposes of our policy regarding missed deadlines and cancellations, only jobs that are canceled by you (not the client) count toward those percentages.
Writers retain ownership and copyright for any content that is not purchased, so you own any content that was written for a job that ended up being canceled. As long as you remove references to the client, you can repurpose the content for other use.