No. Its time for new lens.
Bay Area - CA
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IMHO, as always, if you are looking at any 5 series Canon, you certainly want a much better lens than that Tamron anyway. The 5 series is way too good of a camera to hamper it with a poor lens. Avoid any zoom with a huge zoom range. If you do want that type of zoom photography look at the Powershot P&S line up. Again, MHO.
Several companies make lens adapters, but it's impossible to make any recommendations without knowing what mount your Tamron lens is made for. I use a Sigma MC-11 to adapt my Canon lenses for use with a Sony A6400, and it works very well.
The Sigma MC-11 can easily be modified to accept EF-S lenses. All that has to be done is a removal of the internal plastic cover, which sits under the outside ring. It's removal does not effect the function of the adapter in any way.
This is commonly done and takes just a few minutes to do.
12/05/2023: New firmware updates are available.
09/26/2023: New firmware updates are available.
08/18/2023: Canon EOS R5 C training series is released.
07/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
03/30/2023: New firmware updates are available.