It sounds like the balance in an RRSP should be considered to be zero unless you received a distribution from the plan, and you should not include its balance in the total of value of your foreign accounts when determining whether you need to file Form 8938, but if you need to file the FATCA form because non-RRSP assets exceed your threshold, then you need to report the RRSP, but declare its value as zero, based on this IRS page: https://www.irs.gov/businesses/corporations/basic-questions-and-answers-on-form-8938#overview
In general, the value of your interest in the foreign pension plan or deferred compensation plan is the fair market value of your beneficial interest in the plan on the last day of the year. However, if you do not know or have reason to know based on readily accessible information the fair market value of your beneficial interest in the pension or deferred compensation plan on the last day of the year, the maximum value is the value of the cash and/or other property distributed to you during the year. This same value is used in determining whether you have met your reporting threshold.
If you do not know or have reason to know based on readily accessible information the fair market value of your beneficial interest in the pension plan or deferred compensation plan on the last day of the year and you did not receive any distributions from the plan, the value of your interest in the plan is zero. In this circumstance, you should also use a value of zero for the plan in determining whether you have met your reporting threshold. If you have met the reporting threshold and are required to file Form 8938, you should report the plan and indicate that its maximum is zero.
