You’ll remember that SSL 3.0 is no longer secure since October 2014 with the discovery of Poodle attack. And, it is also disabled by default on all popular browsers.
On the other hand, there are still a small number of websites that support SSL 3.0 (which must definitely be disabled).
Starting tomorrow (6 April 2016), we’ll also be dropping support on sending SSL 3.0 compatible requests which will make the monitoring “not function” for those websites (a website’s SSL 3.0 support can be checked from SSL Labs).
Once Uptime Robot detects that a website requires SSL 3.0 for HTTPs communication, it’ll not mark the monitor as down but pause it and notify the user via e-mail with the information for taking action.
P.S> Disable SSLv3 is a nice website that shares “web server specific information” regarding “how to disable SSL 3.0”