You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

monai
1.3.0rc3

This version was deleted from PyPI around 2023-10-19. Installing fails with:
$ pip3 install monai==1.3.0rc3 ERROR: Could not find a version that satisfies the requirement monai==1.3.0rc3
View other deleted versions of monai

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2023-10-18/ \ monai==1.3.0rc3
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
monai-1.3.0rc3-202310080710-py3-none-any.whl (1.3MB)