Release Manager role and what certification is best for this role

Are you applying safe? and do you have release train engineer?

There is no such role in Scrum. In a "Scrum" world you could just as well replace "release manager" with "Dev team".

That said, https://www.scaledagileframework.com/release-train-engineer-and-solution-train-engineer/ might be something to look at. it also pretty much depends on the organization what they see as the proper skills and certification for release managers. i have seen it leaning heavily towards the project management side, but also towards system maintenance / integration (techincal) side.

So itn depends, there might not be a silver bullet here

Can someone please assist me with what is the best training and certification  in the Agile Scrum world for Release Managers ?

From your reading of the Scrum Guide, who makes the decision whether or not to release an increment of usable functionality?

Maybe try to turn it around; what would be a good role for someone with these skills?

Thank you all for your input . My current company is following Scrum. There are not ready for SAFe I believe , as the scrum process is still immature. I am currently a Release Manager,  completed PSM 1 certification.  I am looking when good training or certification will suite and support the release roll in Scrum ?

Thank you all for your input . My current company is following Scrum. There are not ready for SAFe I believe , as the scrum process is still immature. I am currently a Release Manager,  completed PSM 1 certification.  I am looking when good training or certification will suite and support the release roll in Scrum ?

From the Scrum Guide section that describes the Increment which in Scrum is what is released.  

The increment must be in useable condition regardless of whether the Product Owner decides to release it.

That is the closest you will come to a "release" role in Scrum.  But I also echo @Xander Ladage's comment that Development Team would be just as good of a replacement because they also play a large part in the decision making on release quality of the product. 

There is no Release Manager role in Scrum.  However in reality there are a lot of companies that will have the job position.  What I have seen most effective is that the Scrum Team makes a determination that the Increment is in the releasable state and deliver it to the Release Manager to coordinate all of the activities that your organization needs in order to do the actual release.  So your job is outside of the Scrum Framework but could very much be a part of your organization.