The Labor Party of South Carolina has been a ballot-qualified party since 2006. This year, it did not nominate anyone for any partisan office. Under South Carolina law, a party loses its qualified status if it skips nominating anyone for two elections in a row. The party last ran anyone in 2014, so will lose its qualifies status later this year.
The Working Class Party has been ballot-qualified in Michigan starting in 2016. In 2016 it had only three candidates, two for U.S. House and one for State Board of Education. In 2018 it has five U.S. House candidates, four State Senate candidates, and two for the State Board of Education.
The Independent Party of Delaware has no nominees for any partisan office in 2018. The party has been on the ballot continuously starting in 2000, and this is the first time it didn’t nominate anyone. It remains on the ballot as long as it has registration of at least one-tenth of 1% of the state total.
Sweden held a parliamentary election on September 9, 2018. Here is the wikipedia page showing the results. Eight parties won seats, under Sweden’s proportional representation system.
Iowa registration data for September 1, 2018, shows: Republican 32.47%; Democratic 31.24%; Libertarian .58%; Green .14%; independent 35.58%.
In February 2018, the percentages were: Republican 32.72%; Democratic 30.27%; Libertarian .48%; Green .15%; independent 36.39%.