What a pity it is that you can't come!
It's a pity that you can't come.
It's a shame that you're not coming.
It is a pity that you can not come.
It's a pity you couldn't come.
It's a pity that you couldn't come.
It is a pity you cannot come.
It's a pity that you can't come.
It is regrettable that I can't go with you.
It's a real shame you couldn't participate in that.
I'm sorry that I cannot go with you.
I'm sorry I cannot go with you.
I'm sorry, but I can't go with you.
I am sad that you will go back to your country.
It's a pity that you can't join us.
It's a pity that you can't join us.
It's too bad that you couldn't come together with us.