Unfortunately, Canon’s cheapo Rebel T3 doesn’t have the auto-focus micro-adjustment feature, that is reserved for their more expensive cameras.
I wonder if @nasa wasn’t onto something about it’s being dropped, or mis-aligned somehow. Otherwise, remember that the Rebel T3 is only a cheap entry level DSLR, so you can’t expect world shattering AF. On the other hand, I would expect it to focus at least 50% of the time! One thing to remember…
The Rebel T3 only has 1 cross-type focus point, the one in the middle. That one is the most accurate/sensitive, so if you always use that one, you might get better results. When I’m using a telephoto lens, I often take multiple shots of the same subject, focusing each time. That should increase the odds of your getting at least one photo in focus.
BTW, I like that photo you posted, there’s certainly no focusing issues with that one!
If you have Google Drive installed on your computer, you can just copy the picture to your Google Drive folder and allow it to upload, then right-click on your photo in your Google Drive folder, and select “Google Drive” > “Share…” That should open a dialog box where it asks you to put in the e-mail address of the person to share it with. Instead inputting an e-mail address, click on “Get shareable link” in the upper right hand corner of the box. Just copy that link and paste it into your post here on the forum, and that should do it!