Klonopin (clonazepam) and Ativan (lorazepam) are both benzodiazepines. Suboxone (buprenorphine) is an opioid.  The combination of opioids and benzodiazepines is one of the leading causes of death due to overdose.  The combination of these two medications creates respiratory depression.  Taking both together can cause you to stop breathing and eventually lead to cardiac arrest and death. 

If you are taking benzodiazepines, prescribed or not prescribed, you need to let your Suboxone (buprenorphine) provider know so that you can come up with a plan to either decrease the amount of or discontinue the benzodiazepines.  There are many other medication options to replace benzodiazepines which are prescribed or used for anxiety.