'90 Day Fiance' Season 3 Finale Spoilers: Carolina Gets Wedding Jitters, Melanie's Sister Doubts Devar [WATCH]

TLC's "90 Day Fiance" is about to air its final episode for season 3 as the foreign fiances' K-1 visas are about to expire. Two couples have already tied the knot last episode 8, and for the season finale, fans will see what happens to the remaining couples.

TLC's trailer shows Carolina getting homesick as she approaches her deadline.

"I miss my family so much," the 22-year-old Colombian says. "Before the wedding, I want to Skype [with them], to feel them closer to me."

She chats with her family members and tearfully tells them that she's scared.

"Even though you're marrying Fernando, you are marrying the whole family," her father reminds her. "As difficult as the mother-in-law may appear, you have to get to know them."

This gives Carolina even more jitters, as her relationship with Fernando's family, especially with his mom, has not been great.

"The family of Fernando hasn't accepted me, so I feel a little alone," Carolina says in her on-cam interview. "I'm not sure about my life with Fernando now in America. I don't know how to make the right decision."

Will Carolina stay with Fernando and push through with the wedding?

Meanwhile, The Wrap reported spoilers about Melanie and Devar's wedding preparations. Melanie's sister, who will serve as her bridesmaid, has some serious issues with Devar.

"I do not trust Devar," the bridesmaid says. "I will be warning Mel and letting her know my opinion. I always have, and I will continue."

Melanie brushes off her sister's fears. "I know my sister may have a few things that she's concerned about with Devar. But, I think in time, she will see that he does love me and that he can be trusted," she says.

Her sister's concern may be a valid one, considering the premise of the reality series. In fact, fans of the show have been voicing their strong opinions about Devar as well.

"Melanie's sister is not lying. I know two Jamaican men that married American women just to gain citizenship here. They cheat...they do whatever they want," one fan wrote on a Facebook fan page.

"90 Day Fiance" season 3 finale will also feature the conclusion to Nikki & Mark and Loren & Alexei's stories. It airs tonight, Dec. 6, 9 p.m. on TLC. Watch the sneak peak below:

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