Website rankings can be a bit finicky sometimes. There could be a few reasons why your website suddenly disappeared from the rankings:

1. Algorithm Updates: Search engines like Google frequently update their algorithms. Sometimes, these updates can affect how your website ranks. If your site doesn’t meet the new criteria or if there are changes in the way the algorithm works, your ranking may drop.

2. Technical Issues: Check if there are any technical issues with your website. Maybe there was a server outage, a broken link, or a slow loading speed. These can negatively impact your ranking.

3. Content Changes: If you made significant changes to your website’s content, it could impact your ranking. Search engines like fresh content, but sudden and drastic changes might confuse them.

4. Competitive Landscape: Your competitors may have upped their game. If they improved their websites or started using better SEO strategies, they might have overtaken your position.

5. Penalties: If you’ve been engaging in shady SEO practices, search engines could penalize your site, causing it to drop in rankings.

6. Backlinks: Sometimes, changes in your backlink profile can affect rankings. If you lost valuable backlinks or if low-quality websites are linking to yours, it can hurt your ranking.

7. Mobile-Friendly: Ensure that your website is mobile-friendly. With the rise of mobile device usage, search engines prioritize mobile-responsive sites.

8. User Experience: If visitors are bouncing off your site quickly, it sends a signal to search engines that your site isn’t providing what users want. Improving user experience can help.

To fix this, start by checking for technical issues, reviewing recent changes to your website, and analyzing your competitors’ strategies. If you suspect penalties or backlink issues, consider seeking help from an SEO expert. Patience is key in SEO; rankings can fluctuate, so don’t get discouraged. Keep working on improving your site’s quality and relevance, and you should see positive changes over time.