According to EV Sales Blog, car sales in Iceland collapsed in April by 40% year-over-year and that included plug-ins (246, down 21%). However, the share of plug-ins expanded during the first four months of 2019 to 22%!
The latest report includes also the Tesla Model 3 in the Top 20, thanks to 7 new registrations in April (11 YTD). As Tesla is not present in Iceland, those are cars imported privately.
Plug-in electric car sales in Iceland - April 2019
Source: EV Sales Blog