I'm sorry to hear that

Is duilich leam sin a chluinntinn

We are going to learn expressions here to show sympathy to someone who has received bad news.

You will see a few below:

Tha mi duilich do naidheachd-sa a chluinntinn.
I'm sorry to hear your news.
Abair droch naidheachd.
What bad news.
'S bochd an naidheachd sin.
That's awful news (lit. that news is poor).
Is duilich leam sin a chluinntinn.
I'm sorry to hear that.

We can/could use:

tha mi duilich …
I am sorry …
is duilich leam …
I am sorry …

to show co-fhulangas (sympathy) to someone.