OpenSubtitles.org (or Subscene.com if it's back up).
You can download English subtitles for Shutter Island format from several reputable community-driven platforms. These files are typically provided as a ZIP folder that you must extract before use. Top Sites to Download Shutter Island OpenSubtitles
How to Download and Add English Subtitles for Shutter Island (2010)
A simple, direct interface for quick downloads. 🛠️ How to Use the Subtitle File Download: Save the .srt file to your computer.
Manchester Drainage