Use OpenGApps (nano or pico recommended) – ARM / 10.0 / pico Link: https://opengapps.org → Platform: ARM, Android: 10, Variant: pico
Finally found a working Custom ROM link for the S3 (i9300). It runs surprisingly smooth on the new update. samsung s3 custom rom android 10 link
Once installed, LineageOS 17.1 on the S3 offers a surprisingly smooth experience. Android 10 brings a host of new features, including: Use OpenGApps (nano or pico recommended) – ARM / 10
The Samsung Galaxy S3 (GT-I9300), originally released in 2012 with Android 4.0.4, has seen an incredible extended life through the developer community including: The Samsung Galaxy S3 (GT-I9300)