<p>Acetone is banned in my country, and I cannot get it.</p>

<p>What substitute could I use?</p>

The answer really depends on what you are using it for. Is it for dissolving ABS? A
quick google search
should show you what you want.
The thread,
Could you recommend me a suitable alternative to acetone as solvent?
, has a good many points that are worth considering:
For example, you may need to consider the
Polarity Index
Burdick & Jackson solvents
are arranged in order of increasing
  polarity index, a relative measure of the degree of interaction of the
  solvent with various polar test solutes.
If you are using it to dissolve a polymer other than ABS, then the family/class of polymer may need to be considered:
Apart from your desired solvent qualities (non-flammability and low boiling point), the choice will be totally dependent on the family/ class which the polymer  belongs. Based on the principal that 'like dissolves like, the attached document will provide you with good ideas on which solvent to use when a particular repeating unit of the polymer is involved.
Butanone is a possibility:
One alternative is butanone (button-2-one) - this is similar to acetone, but has a much higher boiling point. It is often used for alkylations etc. It has a boiling point of 79-80°C compared to 56°C of acetone.
or NMP:
N-methyl-2-pyrrolidone (NMP) can be used. It is a polar aprotic solvent and dissolves many polymers. It has high boiling point ( >200 degree centigrade)  It is soluble in water and easy to dispose which is a great advantage during work up of reactions.
However, some other alternative chemicals are listed here (from
Any good alternative to Acetone
?:
Butyl alcohol
methyl isobutyl keytone (MIBK)
denatured alcohol
MEK (methyl,ethyl,ketone), i.e. Kleen-Strip MEK Alternative
Ethyl Acetate
Some branded items, from
Alternatives to Acetone
:
Surfasolve
Surfasolve is a 100 percent biodegradable acetone replacement that removes adhesives, degreases tools and works as a resin solvent.
    Surfasolve is a non-regulated product.
Bio-Solv
Bio-Solv is an acetone replacement that is 100 percent biodegradable. It is not deemed a hazmat, so shipping will not cost
    you more. This acetone alternative is not listed on California
    Proposition 65, a law passed in 1986 to keep substances that cause
    cancer and birth defects out of drinking water. Nevertheless, you want
    to use Bio-Solv in a well-ventilated area because of an unpleasant
    odor. It is not, however, a hazardous air pollutant. Bio-Solv is not
    petroleum based.
Replacetone
Replacetone is another acetone alternative. It is nonflammable and nonvolatile. It can be used as an acetone or MEK (methyl ethyl ketone,
    an industrial solvent) replacement that is biodegradable. Both
    Replacetone and Bio-Solv are referred to as green acetone.
Methyl Acetate
Methyl acetate is offered as an acetone replacement. Manufactured by the Eastman Chemical Company, it is utilized in industrial
    applications. It is biodegradable, volatile organic compound exempt
    and non-HAP (hazardous air pollutant)
Important note
However,
some of these items may also be banned in your country
, so check first. As you do not say which country that you are from, it is not possible to qualify this statement.
It is worth remembering that some of these substances are
not
as safe as acetone, and
the fumes may be more toxic
, so they should always be used in
well ventilated spaces
.