Is there a way to save the partially filled form?

If a user is interrupted while filling out the form will the answers that they have filled in be saved and available if they come back to the form at a later time?

The data will be stored only when you enable the Save and Continue later feature. You can either use the AutoFill or session method to store the partially filled form data.

1. Auto Fill: It will save the user's input data every few seconds in browsers cookie. But the things to be noticed is, if the user accesses the form from a different browser or if the user clears the browser cache then the saved data will not be available.

To activate this, go to Settings > Form Settings > Show More Options, and Enable the field Continue Forms Later.

Here is the guide: How-to-Enable-Auto-Fill-on-Forms

2. Session: This feature requires two forms and the Main form should contain a page break. The input data will be saved only when the user clicks on the Next button.