Gece tam bir rezaletti.

• gece = night / the night
• tam = complete, exact, totally
• bir = a/an, but here it helps create the meaning a complete...
• rezaletti = was a disgrace / was a disaster / was awful

So structurally, it is:

Gece + tam bir rezalet + -ti
= The night was a complete disaster.

The main idea is that rezalet is the predicate, and -ti marks past tense.

In Turkish, sentences with to be often do not use a separate standalone verb the way English does.

In the present tense, Turkish usually has zero copula in the 3rd person:

• Gece tam bir rezalet. = The night is a complete disaster.

In the past tense, Turkish adds a suffix to the predicate:

• Gece tam bir rezaletti. = The night was a complete disaster.

So English uses a separate word was, but Turkish often expresses that idea with an ending.

Because the past tense copular ending is attached to the noun predicate.

The base word is:

• rezalet = disgrace / disaster / mess

To say was a disgrace/disaster, Turkish adds the past copula:

• rezalet + ti → rezaletti

Why -ti?

• the last vowel in rezalet is e, so the vowel in the suffix becomes i
• the word ends in t, a voiceless consonant, so the suffix starts with t rather than d

That is why you get rezaletti.

Not really. It is primarily a noun meaning something like:

• disgrace
• scandal
• awful mess
• disaster

In Turkish, nouns can be used as predicates very naturally:

• Bu bir sorun. = This is a problem.
• Gece rezaletti. = The night was a disaster.

So in this sentence, rezalet is functioning as a noun predicate, not as a normal adjective.

tam bir is a very common emphatic pattern. It means something like:

• a complete
• a total
• an absolute

So:

• tam bir rezalet = a complete disaster
• tam bir felaket = a total catastrophe
• tam bir saçmalık = complete nonsense

Here, tam strengthens the noun phrase, and bir is part of that natural expression.
Without tam, the sentence would still work:

• Gece bir rezaletti. = The night was a disaster.

But tam bir makes it stronger.

Because in Turkish, bir can function like a/an, but it also often appears in emphatic phrases such as tam bir ...

So in this sentence, bir is not just a literal article. It helps build the expression tam bir rezalet, which feels natural and idiomatic.

Compare:

• rezaletti = was a disaster / was disgraceful
• tam bir rezaletti = was a complete disaster

So bir is part of the natural phrasing, not something you should always translate word-for-word.

Because gece is the subject of the sentence.

The sentence is basically:

• Gece = subject
• tam bir rezaletti = predicate

Turkish subjects often appear with no special ending in the basic form.

So:

• Gece tam bir rezaletti. = The night was a complete disaster.

If gece had another ending, the meaning would change:

• gecede = in the night / at night
• geceyi = the night as an object
• gecenin = of the night

Here, none of those are needed, because gece is simply the thing being talked about.

It can be understood as the night in context.

Turkish often does not mark definiteness the same way English does. A bare noun like gece can be interpreted from context as:

• night
• the night
• sometimes even that night

So the exact English wording depends on context, but the Turkish sentence itself is perfectly normal with just gece.

Yes, Turkish word order is flexible, but the neutral, natural order here is:

• Gece tam bir rezaletti.

That puts the topic/subject first and the predicate at the end, which is very standard.

Other orders are possible for emphasis, but they sound more marked:

• Tam bir rezaletti gece.
  This is more dramatic or literary.

• Rezaletti gece.
  Possible in special contexts, but not the normal learner-friendly order.

So if you are learning, Gece tam bir rezaletti is the safest and most natural version.

Yes. That is grammatical and natural.

• Gece rezaletti. = The night was a disaster.
• Gece tam bir rezaletti. = The night was a complete disaster.

The second version is stronger and more expressive.
So tam bir adds emphasis, not basic grammatical necessity.

Rezalet often means more than just bad. It suggests something like:

• embarrassingly bad
• a mess
• a disgrace
• a disaster
• a fiasco

So Gece tam bir rezaletti is stronger than simply saying:

• Gece kötüydü. = The night was bad.

It implies the night went very badly, perhaps in a chaotic, humiliating, or ridiculous way.

Yes, historically and structurally this past copula is related to idi, and sometimes learners see forms explained that way.

A fuller way to think of it is:

• rezalet idi → contracted in normal speech/writing to rezaletti

In modern standard Turkish, rezaletti is the normal written form here.

So if you have learned idi separately, this sentence is a good example of how it often appears as a suffix-like ending in actual use.

In the 3rd person present tense, Turkish usually has no visible to be word:

• Gece tam bir rezalet. = The night is a complete disaster.

Past tense adds the copular ending:

• Gece tam bir rezaletti. = The night was a complete disaster.

So this sentence is a useful example of the contrast:

• present: no overt is
• past: visible ending meaning was