Can I send the six semester mark sheet later once it is issued by my university in UK?

Yes, you can usually submit your sixth-semester mark sheet after it is issued by your university.

Most UK and Canadian universities accept provisional transcripts or predicted grades during the application process and allow you to provide your final mark sheet later to meet their conditions. This is a common process, especially if final results are not yet available at the time of application.

Specific requirements and deadlines can vary by university.