Costa Rica - Andreas Hamm, a freestyle skier has a semi-decent shot at qualifying
Afghanistan - Afghanistan has a couple alpine skiers seeking qualification, more of their abilities will be seen at the Asian Winter Games next year
Uganda - Uganda has a snowboarder currently chasing qualification in slopestyle. Might be a bit of a longshot at this point
Eritrea - Shannon Abeda, a Canadian born alpine skier, who competed in 2012 at the Youth Olympics. He was very close to qualifying in 2014, but just missed the cut. He should qualify this time around
Colombia - Their speed skating team should qualify at least one athlete, and their Youth Olympian from 2016 in alpine skiing should qualify
Ecuador - They have a CC skier, who is at this point a bit of a long shot, but you never know
Ghana - Ghana has a skeleton athlete who is originally Dutch, and is just outside the qualification range, but anything is literally possible
South Africa - This time hopefully Slive Spleeman gets to go! He qualified but the Olympic Committee rejected the quota. There is also a Swedish born snowboarder who has a semi decent shot of qualifying.
North Korea - This is a mystery. Their athletes usually come out of nowhere to do well in most sports. Speed skating/figure skating remain a possibility for them.
Trinidad and Tobago - Another skier (cross country) with Canadian roots, is within striking distance of qualifying.
Singapore - long shot in short track speed skating
I didn't include Puerto Rico, because they will reject the quota(s). they earn.
Of the 2014 list, British Virgin Islands (hasn't competed since 2014), Zimbabwe (hasn't competed in a while), Tajikistan (no athletes currently competing at the qualification level), Dominica (no athletes) and Nepal (retired) are in threat of not qualifying