Hepinize iyi akşamlar!

I please somebody to explain to me if evlendirecekler is past or future tense?

İleri teşekkürler!

It´s future but I´m not quite sure how the ´-dir´ fits in. Here´s a link to the tense:

http://www.turkishlanguage.co.uk/causative.htm

I think it means: they will get whomever married

It could also mean ´the ones who will marry´, as a noun. 

In history when marriages were arranged this is not a strange thing maybe. 

They will marry - future 

Like introducing two people to eachother for the purpose of marriage.

seems a little presumptuous though in future tense lol

edit: forced marriage is zorla evlendirmek, so theres a distinction 

Şimdi anladım...I got it! ...Causative mood.

"...someone will marry them..." So normally...

And so: -dir is from causative mood, because if they´d do it by themselves there ´ll be no -dir.

The link denizli had posted for me, has been sooo...useful!

Hepinize ama özellikle denizli, teşekkür ederim!

There is also something like ´matchmaking´. That´s not so much ´forced´ as it is tradition for families to arrange marriages, indeed to bring ppl together. Not uncommon at all in some countries. But you are right, there is a distiction between ´force´ and ´tradition´. 

I think you meant "thanks in advance" with "ileri teşekkürler".

"Thanks in advance" means "şimdiden teşekkürler" 

So you have never heard anyone using "ileri teşekkürler" in colloquial quarters?

Evlen-mek 

evlen-ecek = he/she/it will marry

evlen-ecek-ler = they will marry

evlen-dir-ecek = he/she/it will have sb married

evlen-dir-ecek-ler = they will have sb married

-dir = causative mood

In fact, Marry  aldready has evlendirmek meaning.