June 9 is the convocation. I have already crossed the processing time which shows 95 days but will apply next week just gathering documents as my application to graduate was pending and got approved this week. I am very thankful for your advice, will work on my letter.That isn’t a lot of their own funds for a 3 week visit. You will want to write a strong letter of invitation saying you will provide accomodations etc. Your brother’s support may or may not be considered since he doesn’t live in Canada.
Not sure when your convocation but they may want to apply soon.