Google Optimize[ Edited ]
May 2017 - last edited May 2017
From what I can tell, NO.
However, I believe I found a work around that may do the job. Select the experiment you would like to "pause", then scroll to the bottom of the paqe and select the targeting tab, change the "Percentage of visitors to target" to 0% and then save (top right hand corner) This should send Visitors to your original page.
One other way that may pause the experiment without turning it off, is to remove or comment out the snippet on the site, then when ready to turn back on place the snippet back on the page